/ Dictionary / Index O occlusion: Meaning and Definition of Find definitions for: oc•clu•sion Pronunciation: (u-kl'zhun), [key] — n. the act or state of occluding or the state of being occluded. the fitting together of the teeth of the lower jaw with the corresponding teeth of the upper jaw when the jaws are closed. closure or blockage of a blood vessel: coronary occlusion. momentary complete closure at some area in the vocal tract, causing stoppage of the flow of air and accumulation of pressure. the formation of an occluded front. Seeoccluded front. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: occlusion (Thesaurus) occluded front occlusive Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language