Pronunciation: (trung'kā-tid),[key] —adj. 1. shortened by or as if by having a part cut off; cut short: an unnecessarily truncated essay. 2. (of a geometric figure or solid) having the apex, vertex, or end cut off by a plane: a truncated cone or pyramid. 3. Crystall.(of a crystal) having corners, angles, or edges cut off or replaced by a single plane.
4. Biol.truncate (def. 4).
5. Pros.(of a line of verse) lacking at the beginning or end one or more unstressed syllables needed to fill out the metrical pattern.