OCCLUSION

n. 1 the act or process of occluding. 2 Meteorol. a phenomenon in which the cold front of a depression overtakes the warm front, causing upward displacement of warm air between them. 3 Dentistry the position of the teeth when the jaws are closed. 4 the blockage or closing of a hollow organ etc. (coronary occlusion). 5 Phonet. the momentary closure of the vocal passage. occlusive adj.