Definition of occlusion in English:


Line breaks: oc¦clu|sion
Pronunciation: /əˈkluːʒ(ə)n


[mass noun]
1 Medicine The blockage or closing of a blood vessel or hollow organ.
More example sentences
  • Localized observation of blood vessel stasis, occlusion or vessel dilation have all been observed with Photofrin treatment in vivo.
  • Two of the 4 patients with cirrhosis had hepatic infusion chemotherapy and therapeutic occlusion of hepatic arteries.
  • The blood vessel wall is usually involved early with resultant hemorrhage, thrombotic occlusion, and lung infarction.
2 [count noun] Meteorology A process by which the cold front of a rotating low-pressure system catches up the warm front, so that the warm air between them is forced upwards off the earth’s surface between wedges of cold air.
More example sentences
  • In a cold occlusion, the reverse occurs and the occlusion resembles a cold front.
  • The second type is a warm occlusion, which occurs when the air behind the front is warmer than the air ahead of the front.
2.1An occluded front.
More example sentences
  • In both types of occlusions, the occluded front has well defined vertical boundaries between the coldest air, the cool air, and the warm air.
  • The meteorological language, which Doogan edits slightly, destabilizes into a poetry of cyclones, occlusions and disturbances.
3 Dentistry The position of the teeth when the jaws are closed.
More example sentences
  • The initial jaw position was obtained with the teeth in centric occlusion.
  • The multi-cusped cheek teeth, complex occlusion and extensive palinal power stroke were well suited for shredding fibrous plant material.
  • Posterior teeth may need to be replaced to restore occlusion.


mid 17th century: from Latin occlus- 'shut up' (from the verb occludere) + -ion.



More example sentences
  • For purposes of revascularization, PVD is considered in terms of inflow and outflow occlusive disease.
  • Despite its accuracy in determining occlusive disease, patient motion may decrease clarity and resolution in 10% to 15% of studies.
  • The lesions were subsequently covered with an occlusive nonsterile Tegaderm dressing.

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