(1):

(n.) A satirical poem (such poems having been anciently written in iambic verse); a satire; a lampoon.

(2):

(a.) Pertaining to, or composed of, iambics; as, an iambic verse; iambic meter. See Lambus.

(3):

(n.) An iambic foot; an iambus.

(4):

(n.) A verse composed of iambic feet.

(5):

(a.) Consisting of a short syllable followed by a long one, or of an unaccented syllable followed by an accented; as, an iambic foot.