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.
Derivatives:
occlusive adj.