Definitions for "Iambic pentameter"
poetry consisting of five parts per line, each part having one short or unstressed syllable and one long or stressed syllable
(LDOCE 3)[C,U] a common pattern of beats in English poetry, in which each line consists of five iambs.
a metrical form in which the basic foot is an iamb and most lines consist of five iambs; iambic pentameter is the most common poetic meter in English: "One com | mon note | on ei | ther lyre | did strike" (Dryden, "To the Memory of Mr. Oldham")