oc|clu|sion

oc|clu|sion
oc|clu|sion «uh KLOO zhuhn», noun.
1. an occluding or being occluded.
2. Medicine. the blocking of a blood vessel, as by thrombosis, embolism, or gradual narrowing: »

The President had suffered a mild cerebral occlusion (Wall Street Journal).

3. Dentistry. the meeting of the teeth of the upper and lower jaws when closed.
4. Phonetics. the momentary cutting off of the stream of air in the articulation of a stop, produced as by pressing the lips together or the tongue against the upper teeth: »

Nasal consonants are produced by the obstruction or occlusion of the buccal passage (Simeon Potter).

5. Meteorology. a) the process in which a cold air mass overtakes and forces upward a warm air mass in a cyclone, thereby meeting a second cold air mass originally in front of the warm air mass. Occlusion increases the intensity of a cyclone. b) the contact between these two cold air masses.
6. Chemistry. the absorption and retention of a gas or other substances, as by a metal.
╂[< Latin occlūsus, past participle of occlūdere occlude + English -ion]

Useful english dictionary. 2012.

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Look at other dictionaries:

  • ex|clu|sion|ar|y — «ehk SKLOO zhuh NEHR ee», adjective. of or having to do with exclusion: »an exclusionary rule …   Useful english dictionary

  • ex|clu|sion|er — «ehk SKLOO zhuh nuhr», noun. = exclusionist. (Cf. ↑exclusionist) …   Useful english dictionary

  • in|clu|sion — «ihn KLOO zhuhn», noun. 1. the act or fact of including: »The Dutch should have obliged themselves to make no peace without the inclusion of their Allies (Sir William Temple). 2. the state of being included. 3. a thing included: a) a body present …   Useful english dictionary

  • pre|clu|sion — «prih KLOO zhuhn», noun. the act or fact of precluding or condition of being precluded: »The preclusion of disturbance and indecorum in Christian assemblies (Samuel Taylor Coleridge). ╂[< Latin praeclūsiō, ōnis < praeclūdere preclude] …   Useful english dictionary

  • re|clu|sion — «rih KLOO zhuhn», noun. 1. the act of shutting up or condition of being shut up in seclusion. 2. solitary confinement. 3. the condition or life of a recluse: »She is one of the few nuns in the world with ecclesiastical permission to attempt the… …   Useful english dictionary

  • se|clu|sion — «sih KLOO zhuhn», noun. 1. the act of secluding: »His seclusion of the rabbit in the barn kept it a secret from everyone else. 2. the state of being secluded; retirement: »She lives in seclusion apart from her friends. 3. a secluded place: »Sweet …   Useful english dictionary

  • ex|clu|sion|ism — «ehk SKLOO zhuh nihz uhm», noun. the principle, policy, or practice of exclusion, as from rights or privileges …   Useful english dictionary

  • ex|clu|sion|ist — «ehk SKLOO zhuh nihst», noun, adjective. –n. a person who favors exclusion; a person who would exclude another from some right or privilege. –adj. of or having to do with exclusionists: »They have established rigid import quotas and other… …   Useful english dictionary

  • in|con|clu|sion — «IHN kuhn KLOO zhuhn», noun. 1. the quality of being inconclusive. 2. an inconclusive end or result: »On the frostbitten ridges of Korea, it became necessary to carry a stalemate to its logical inconclusion (Time) …   Useful english dictionary

  • mal|oc|clu|sion — «MAL uh KLOO zhuhn», noun. failure of teeth opposite each other in the upper and lower jaws to close or meet properly …   Useful english dictionary

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