What is an acrostic poem?

The short definition

An acrostic poem is a poem in which the first letter of each line, read downwards, spells out a word, a name or a message. The spelled word is usually the subject of the poem, which means the form does two things at once: it says something horizontally, in the ordinary way that poems do, and it says something else vertically, in the margin, where a reader only notices it if they look.

Six lines beginning A, U, T, U, M, N make an acrostic on the word autumn. Twenty-one lines spelling out a child's full name make an acrostic on that child. The hidden word is called the spine (or, in older criticism, the acrostich), and everything else about the poem — length, rhyme, metre, subject — is left open.

That is the whole of the definition. Everything else — the arguments about whether it counts as a real form, the reason it turns up in every primary school in the English-speaking world, the reason it also turns up in the Hebrew Bible and in a Californian governor's veto letter — is history and taste.

Where the word comes from

The word is Greek: akrostichis, built from akros, meaning topmost or outermost, and stichos, meaning a line of verse. The topmost part of the line. The name is unusually literal, and it tells you that Greek readers already thought of the letters at the start of a line as a place where something could be hidden. The Merriam-Webster entry records the same root, and the Poetry Foundation's glossary gives the modern one-line definition.

A short history, from Cicero to the veto letter

The acrostic is old enough that its origin is genuinely unclear, and it has been reinvented several times for completely different reasons.

Concealment and authority

Cicero, writing in the first century BC, notes that the Sibylline prophecies were composed as acrostics, and treats that as evidence against their divine origin: a frenzied oracle does not stop to arrange her first letters. The acrostic, in other words, was already being read as a signature — proof of a careful human hand. Latin poets used it the same way, hiding their names in the openings of works that otherwise gave no author.

Memory and completeness

A separate tradition runs through Hebrew scripture, where several poems are alphabetic acrostics: the spine is not a name but the alphabet itself, in order. Psalm 119 is the extreme case, twenty-two stanzas of eight verses each, every verse in a stanza beginning with the same Hebrew letter. Lamentations does it four times over. The effect is completeness — grief or praise expressed from A to Z, with nothing left out — and, incidentally, a structure that is far easier to memorise and to check for missing lines. This is the ancestor of the modern abecedarian.

Dedication and flattery

Medieval and Renaissance writers used acrostics to name patrons, lovers and themselves. Boccaccio built one across the capitals of an entire long poem. Ben Jonson opened The Alchemist with a verse argument whose first letters spell the play's title. The device was fashionable enough to become a mark of cleverness, and then fashionable enough to become a mark of trying too hard, which is roughly where its reputation has stayed.

Victorian affection

The nineteenth century turned the acrostic into a parlour form: album verses, valentines, riddles in magazines. Two of the best-known English examples come from this period. Lewis Carroll closed Through the Looking-Glass with a twenty-one-line poem whose first letters spell ALICE PLEASANCE LIDDELL, the full name of the child the Alice books were told to. Edgar Allan Poe wrote several, including one for a cousin and a diagonal acrostic in which the hidden name steps one letter further along on each line. Both are covered in famous acrostic poems.

The modern acrostic

Today the form lives in two places that barely acknowledge each other. In schools it is the standard first poem, because the constraint does the frightening part of the work for a child who has never written a line. And in public life it survives as a way of saying something you are not saying: a resignation letter, an official communication, a comment thread, where a reader who happens to look down the left margin finds a word the writer never typed on any single line. In 2009 the Governor of California returned a bill with a veto message whose first letters spelled a seven-letter obscenity; his office insisted it was a coincidence, and nobody believed them.

What an acrostic is not

Three things get confused with acrostics often enough to be worth separating.

Worth noting too: the early Christian fish symbol, ICHTHYS, is often called an acrostic. It is really an acrostic of words rather than lines — the initials of a five-word Greek phrase — which puts it closer to an acronym. The label has stuck anyway, which tells you how loosely the term has always been used.

The rules, such as they are

There is exactly one rule: the first letters must spell the word, in order, one letter per line. Everything a reader might assume is optional.

• Rhyme is optional, and usually a mistake. You are already writing under one constraint; adding a second normally shows. Most published acrostics do not rhyme.
• Metre is optional. Carroll's is in strict trimeter because Carroll wrote in strict trimeter. Nothing about the form requires it.
• Length is set by your word, which is the form's one genuine constraint on content. A four-letter word gives you four lines and no room to build; a fifteen-letter name gives you fifteen and a real risk of padding.
• Capitalisation is a convention, not a rule. Capitalising the spine letters makes the poem legible as an acrostic at a glance. Leaving them lower case hides it, which is sometimes the point.
• Punctuation and grammar carry across lines freely. A line does not have to be a sentence.

Why the form survives

Most fixed forms survive because they produce a particular music — the sonnet's turn, the villanelle's obsessive returning. The acrostic produces no music at all. What it produces is a reason to start.

A blank page asks an impossible question: what do you want to say about this person? An acrostic asks eleven easy ones: what is true about her that starts with C? That is why it is the first poem taught to children, and it is also why adults reach for it at exactly the moments when writing is hardest — a card for someone who is leaving, a speech, a eulogy. The constraint is not decorative. It is scaffolding, and it works.

The second reason is the margin. An acrostic contains a message its own lines never state. The reader who notices gets the small pleasure of having noticed, and the writer gets to say something sideways. Carroll never once wrote Alice's name in that final poem. It is on every line.

Common questions