What Is a Sonnet? Definition, Types & Examples

You may have heard the word sonnet in an English class and wondered what makes a poem a sonnet rather than simply a short poem. What is a sonnet, exactly? At its simplest, a sonnet is a traditional 14-line poetic form with a deliberate structure, often using rhyme and iambic pentameter. But the interesting part isn’t just counting the lines. Sonnets use that limited space to develop an idea, feeling, question, or argument and then often turn it in a new direction. This guide explains the sonnet definition, its history, structure, major types, famous examples, and the practical choices involved in writing one.

What Is a Sonnet in Poetry?

A sonnet is a 14-line poem that traditionally follows a particular structure, rhyme scheme, and meter. Traditional sonnets commonly use iambic pentameter and contain a volta, or turn, in which the poem shifts its thought, argument, mood, or perspective. There are several sonnet forms, with the Petrarchan and Shakespearean versions being the two most familiar.

The word sonnet comes from the Italian sonetto, meaning “little sound” or “little song.” The form began in Italy and later became one of the best-known fixed forms in English poetry.

The 14-line limit is important, but it isn’t the whole story. A sonnet usually has an internal movement. The poet might introduce a problem, describe an emotion, ask a question, make an argument, or praise someone. Then the poem turns and gives that material a different meaning.

That turn is called the volta.

So when you’re identifying a sonnet, don’t look only at the number of lines. Look at what the poem is doing with those lines.

Where Did the Sonnet Come From?

The sonnet developed in Italy during the 13th century, with Giacomo da Lentini commonly credited with its invention. The form became particularly influential through the Italian poet Francesco Petrarch, whose sonnets helped establish the pattern now known as the Petrarchan or Italian sonnet.

The form eventually travelled to England during the 16th century. English poets including Sir Thomas Wyatt and Henry Howard, Earl of Surrey, helped introduce and reshape the Italian tradition for English-language poetry.

English presented a practical problem for poets working with tightly controlled rhyme. Italian has many words that naturally rhyme, while English has a smaller pool of easy rhymes. The English sonnet developed a different structure that gave poets more room to work with rhyme.

This became the form associated most strongly with William Shakespeare.

Shakespeare wrote 154 sonnets, published together in 1609. His use of three quatrains followed by a closing couplet helped make the Shakespearean sonnet one of the most recognizable poetic forms in English.

The form was originally strongly associated with love and desire, but poets have used sonnets to address much more than romance. Sonnets can examine mortality, religion, politics, nature, memory, identity, art, grief, and time.

What Is a Sonnet Structure and Rhyme Scheme?

The traditional sonnet structure contains 14 lines, but the way those lines are organized depends on the type of sonnet.

The two major forms are the Petrarchan sonnet and the Shakespearean sonnet.

Petrarchan Sonnet Structure

A Petrarchan sonnet divides its 14 lines into two major sections:

Octave: the first eight lines
Sestet: the final six lines

The octave traditionally follows the rhyme scheme:

ABBAABBA

The sestet is more flexible. Common patterns include:

CDECDE

CDCDCD

The volta often appears around the transition from line 8 to line 9. The first eight lines may present a problem, observation, desire, or argument, while the final six lines respond to it or change the speaker’s perspective.

Shakespearean Sonnet Structure

The Shakespearean, or English, sonnet uses a different organization:

Three quatrains + one couplet

A quatrain is a four-line unit, while a couplet contains two lines.

The standard rhyme scheme is:

ABAB CDCD EFEF GG

The first quatrain can introduce an idea. The second can develop it. The third can complicate or deepen it. Then the final couplet often delivers a conclusion, contrast, observation, or surprising turn.

What Is a Sonnet Rhyme Scheme?

A rhyme scheme is the pattern showing which lines rhyme with each other.

For example, in ABAB, lines 1 and 3 rhyme, while lines 2 and 4 rhyme.

In ABBA, lines 1 and 4 rhyme and lines 2 and 3 rhyme.

This letter system makes it much easier to see the architecture of a poem without having to read every word.

What Is Iambic Pentameter?

Many traditional English sonnets use iambic pentameter.

An iamb is a metrical unit with an unstressed syllable followed by a stressed syllable. Pentameter means that five such rhythmic units generally occur in a line.

A simplified pattern looks like:

da-DUM | da-DUM | da-DUM | da-DUM | da-DUM

That usually gives a line around ten syllables, although natural poetic variation can change the exact rhythm.

Shakespeare’s sonnets are famous examples of this meter. The rhythm gives the lines a regular pulse while still allowing the poet to vary emphasis and phrasing.

Famous Sonnet Examples

Some of the best-known sonnets in English were written by William Shakespeare, but Shakespeare is only one part of a much longer tradition.

Shakespeare’s Sonnet 18

Shakespeare’s Sonnet 18, beginning with “Shall I compare thee to a summer’s day?”, is one of the clearest examples of the Shakespearean form.

The poem contains three quatrains followed by a final rhyming couplet. It considers the temporary nature of beauty and contrasts it with the lasting power of poetry.

You can read the complete poem on WriteAPoem.org: Shakespeare’s Sonnet 18.

The poem is especially useful for students because its structure is easy to see. The thought develops across the quatrains before shifting toward the lasting quality of verse near the end.

William Shakespeare

Shakespeare’s work is central to understanding the English sonnet. His 154-sonnet sequence explores love, beauty, aging, jealousy, time, mortality, friendship, and poetic immortality.

Our William Shakespeare biography provides additional context about the poet and his work.

John Milton’s When I Consider How My Light Is Spent

John Milton’s poem is a well-known example of the Petrarchan tradition. It uses the octave-and-sestet organization to develop a question about purpose and service before turning toward an answer.

The poem demonstrates why the sonnet’s division into sections matters. The change in structure helps the reader recognize the change in thought.

Elizabeth Barrett Browning’s How Do I Love Thee?

Elizabeth Barrett Browning’s “How Do I Love Thee?” is another famous example of the Petrarchan tradition. The poem explores the speaker’s love through a tightly controlled form.

It shows that the sonnet doesn’t have to feel like a technical exercise. A strict structure can actually give a strong emotion somewhere to move.

How Sonnet Structure Shapes Meaning

The most useful way to understand a sonnet is to think of its structure as a conversation between ideas.

The opening section usually gives the reader something to consider. It might be a problem, desire, comparison, complaint, memory, or question. The poem then develops that material until the volta changes the direction.

In a Shakespearean sonnet, the turn may arrive near the final couplet. In a Petrarchan sonnet, it commonly occurs between the octave and sestet. But poets don’t always follow these patterns mechanically.

Take Sonnet 18. Shakespeare begins by comparing the beloved to a summer day. As the poem develops, summer itself becomes an example of impermanence. The final movement then shifts toward the idea that poetry can preserve beauty.

That’s the real strength of the form.

The poet isn’t simply trying to fit fourteen lines into a box. The limited space creates pressure. An idea has to move somewhere.

Most people find sonnets harder than they expect, not because fourteen lines are especially long, but because every section needs to do useful work.

How Have Sonnets Changed in Modern Poetry?

Modern poets have kept the sonnet alive by changing some of its traditional rules.

A contemporary sonnet may still have 14 lines but use slant rhyme rather than perfect rhyme. It may loosen the meter, rearrange the traditional sections, or even question the expectation that every sonnet must rhyme.

Some poets have also experimented with extended or unusual sonnet forms. The Poetry Foundation identifies variations including the Spenserian sonnet, curtal sonnet, caudate sonnet, sonnet sequence, and stretched sonnet.

This means you shouldn’t assume that every modern sonnet will look exactly like one of Shakespeare’s.

The traditional form still provides the reference point. Writers can follow it closely, bend it, or deliberately break parts of it.

That flexibility is one reason the form has lasted for centuries.

If you’re learning how sonnets fit within poetry more generally, our guide to different types of poems is a useful next step.

How to Write a Sonnet

Start with one idea that can sustain a little tension. Love is an obvious choice, but it isn’t your only option. You could write about memory, time, frustration, nature, ambition, grief, or an ordinary object that raises a larger question.

Then choose your structure.

For a Shakespearean sonnet, plan three quatrains and a final couplet. Give each quatrain a purpose rather than simply writing four lines and hoping the poem develops on its own. The first might establish the idea, the second might complicate it, and the third might push the argument toward its turn.

The final couplet should do more than repeat what you’ve already said.

If you’re writing a Petrarchan sonnet, think in terms of an octave and sestet. Let the octave establish the central situation, then use the sestet to respond, rethink, challenge, or deepen it.

Next, work on meter and rhyme. If you’re new to formal poetry, don’t try to solve everything at once. Get the thought working first, then revise the language so the rhythm and rhyme feel natural.

Read the poem aloud.

Your ear will often catch an awkward line before your eyes do.

You can also start with our broader guide on how to write a poem before taking on the tighter requirements of a sonnet.

Common Mistakes to Avoid

One common mistake is treating 14 lines as the only rule. A fourteen-line poem isn’t automatically a traditional sonnet. Structure, rhyme, meter, and the movement of thought all matter.

Another mistake is forcing awkward words into a line simply because they rhyme. A rhyme should serve the meaning, not replace it.

Beginners also sometimes make every line express the same idea. A sonnet needs development. Let the thought change.

Finally, don’t assume the volta must always appear at exactly the same point. Traditional forms give you patterns, but poets have always found ways to work creatively within them.

Conclusion

A sonnet is more than a short poem with fourteen lines. Its defining strength comes from the relationship between form and thought: rhyme, meter, sections, and the volta work together to move an idea somewhere. The Petrarchan form divides the poem into an octave and sestet, while the Shakespearean form uses three quatrains and a closing couplet. Modern poets have also adapted these conventions in many ways.

The best way to understand this poetry form is to read several examples closely. Once you can see where the poem sets up an idea and where it turns, the structure stops looking like a collection of rules and starts looking like a method for thinking.

Frequently Ask Questions

What are the three types of sonnets?

The three commonly discussed traditional types are the Petrarchan, Shakespearean, and Spenserian sonnets. The Petrarchan form uses an octave and sestet, the Shakespearean form uses three quatrains and a couplet, and the Spenserian form uses interlocking rhymes between its quatrains. There are also many other variations developed over the centuries.

How many lines are in a sonnet?

A traditional sonnet has 14 lines. The lines are organized according to the particular form being used. A Shakespearean sonnet contains three quatrains and a final couplet, while a Petrarchan sonnet contains an eight-line octave followed by a six-line sestet. Modern variations sometimes alter the traditional length.

What is the rhyme scheme of a Shakespearean sonnet?

The standard rhyme scheme is ABAB CDCD EFEF GG. The first twelve lines form three quatrains with alternating rhymes, while the final two lines form a rhyming couplet. The couplet often provides a conclusion, contrast, or change in perspective.

What is a sonnet in literature?

In literature, a sonnet is a highly structured lyric poem traditionally consisting of 14 lines. Sonnets commonly explore one central idea, emotion, question, or argument and often contain a volta, or turn in thought. Although the form is strongly associated with love poetry, poets have used it for subjects ranging from religion and mortality to politics and nature.

Do sonnets always have to rhyme?

Traditional sonnets normally use a defined rhyme scheme, but modern poets have loosened that convention. Some contemporary sonnets use slant rhyme, irregular rhyme, or little rhyme while retaining features such as the 14-line structure or the idea of a formal turn. The sonnet has remained recognizable partly because poets have continued to adapt its conventions.