Glossary of Poetic Terms

A metrical foot consisting of an unaccented syllable followed by an accented syllable. The words “unite” and “provide” are both iambic. It is the most common metrical foot in English poetry (including all the plays and poems of William Shakespeare), as it is closest to the rhythms of English speech. In Robert Frost’s “After Apple Picking” the iamb is the vehicle for the “natural,” colloquial speech pattern:

       My long two-pointed ladder’s sticking through a tree
       Toward heaven still,
       And there’s a barrel that I didn’t fill
       Beside it, and there may be two or three
       Apples I didn’t pick upon some bough.
       But I am done with apple-picking now.
       Essence of winter sleep is on the night,
       The scent of apples: I am drowsing off.

Elements of a poem that invoke any of the five senses to create a set of mental images. Specifically, using vivid or figurative language to represent ideas, objects, or actions. Poems that use rich imagery include T.S. Eliot’s “Preludes,” Percy Bysshe Shelley’s “Ode to the West Wind,” Sylvia Plath’s “Daddy,” and Mary Oliver’s “At Black River.”

An early 20th-century poetic movement that relied on the resonance of concrete images drawn in precise, colloquial language rather than traditional poetic diction and meter. T.E. Hulme, H.D., and William Carlos Williams were practitioners of the imagist principles as laid out by Ezra Pound in the March 1913 issue of Poetry (see “A Retrospect” and “A Few Don'ts”). Amy Lowell built a strain of imagism that used some of Pound's principles and rejected others in her Preface to the 1916 anthology, Some Imagist Poets. Browse more imagist poets.

An address to a deity or muse that often takes the form of a request for help in composing the poem at hand. Invocations can occur at the beginning of the poem or start of a new canto; they are considered conventions of the epic form and are a type of apostrophe. See the opening of John Milton’s Paradise Lost. Alexander Pope mocked the convention in the first canto of “The Rape of the Lock.” A contemporary example is Denise Levertov’s poem “Invocation.”