The act of occluding, or the state of being occluded. [1913 Webster]
"Constriction and occlusion of the orifice." [1913 Webster]
The transient approximation of the edges of a natural opening; imperforation. Dunglison. [1913 Webster]

Occlusion of gases (Chem. & Physics), the phenomenon of absorbing gases, as exhibited by platinum, palladium, iron, or charcoal; thus, palladium absorbs, or occludes, nearly a thousand times its own volume of hydrogen, and in this case a chemical compound seems to be formed.

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OXFORD DICTIONARY

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.

Derivative

occlusive adj.

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THESAURUS

occlusion

Jacksonian epilepsy, Rolandic epilepsy, abdominal epilepsy, access, acquired epilepsy, activated epilepsy, affect epilepsy, akinetic epilepsy, apoplexy, arrest, arrestation, arrestment, attack, autonomic epilepsy, blockade, blockage, blocking, cardiac epilepsy, check, clogging, clonic spasm, clonus, closing, closing up, closure, constriction, convulsion, cortical epilepsy, cramp, cursive epilepsy, delay, detainment, detention, diurnal epilepsy, eclampsia, epilepsia, epilepsia gravior, epilepsia major, epilepsia minor, epilepsia mitior, epilepsia nutans, epilepsia tarda, epilepsy, falling sickness, fit, fixation, focal epilepsy, foot-dragging, frenzy, grand mal, hampering, haute mal, hindering, hindrance, holdback, holdup, hysterical epilepsy, ictus, impediment, inhibition, interference, interruption, larval epilepsy, laryngeal epilepsy, laryngospasm, latent epilepsy, let, lockjaw, matutinal epilepsy, menstrual epilepsy, musicogenic epilepsy, myoclonous epilepsy, negativism, nocturnal epilepsy, nuisance value, obstruction, obstructionism, opposition, paroxysm, petit mal, physiologic epilepsy, psychic epilepsy, psychomotor epilepsy, reflex epilepsy, repression, resistance, restraint, restriction, retardation, retardment, rotatoria, seizure, sensory epilepsy, serial epilepsy, setback, shutdown, shutting, shutting up, spasm, squeeze, stoppage, stranglehold, stricture, stroke, suppression, tardy epilepsy, tetanus, tetany, throes, thromboembolism, thrombosis, tonic epilepsy, tonic spasm, torsion spasm, traumatic epilepsy, trismus, ucinate epilepsy, visitation

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ROGET THESAURUS

occlusion

Closure

N closure, occlusion, blockade, shutting up, obstruction, embolus, contraction, infarction, constipation, obstipation, blind alley, blind corner, keddah, cul-de-sac, caecum, imperforation, imperviousness, impermeability, stopper, closed, shut, operculated, unopened, unpierced, imporous, caecal, closable, imperforate, impervious, impermeable, impenetrable, impassable, unpassable, invious, pathless, wayless, untrodden, untrod, unventilated, air tight, water tight, hermetically sealed, tight, snug.

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