Occlusion

noun1 Medicine the blockage or closing of a blood vessel or hollow organ.• Phonetics the momentary closure of the passage of breath during the articulation of a consonant.2 Meteorology a process in which the cold front of a rotating low pressure system overtakes the warm front, forcing the warm air upward above a wedge of cold air.• an occluded front.3 Dentistry the position of the teeth when the jaws are closed.