Definition of occlusion in English:

Share this entry


Pronunciation: /əˈklo͞oZHən/


1 Medicine The blockage or closing of a blood vessel or hollow organ.
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.
1.1 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.
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.
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.
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.



Pronunciation: /əˈklo͞osiv/
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.


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

Words that rhyme with occlusion

allusion, collusion, conclusion, confusion, contusion, delusion, diffusion, effusion, exclusion, extrusion, fusion, illusion, inclusion, interfusion, intrusion, obtrusion, preclusion, profusion, prolusion, protrusion, reclusion, seclusion, suffusion, transfusion

For editors and proofreaders

Syllabification: oc·clu·sion

Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.