/ Dictionary / Index A assibilate: Meaning and Definition of Find definitions for: as•sib•i•late Pronunciation: (u-sib'u-lāt"), [key] — v., -lat•ed, -lat•ing. —v.t. to change into or pronounce with the accompaniment of a sibilant sound or sounds. —v.i. to change by assibilation. to become a sibilant or a sound containing a sibilant. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: assibilate (Thesaurus) Asshur Assidean Related Content Daily Word Quiz: winsome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language