Definition of occlude in English:

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Pronunciation: /əˈkluːd/


[with object] formal or technical
1Stop, close up, or obstruct (an opening, orifice, or passage): thick make-up can occlude the pores
More example sentences
  • Tumors in the tracheobronchial tree often occlude major airways producing obstructive pneumonitis and hypoxia.
  • Devices for occluding the urethra include urethral plugs and, more recently, expandable urethral devices.
  • All this is jam-packed into your sinuses and other nasal structures, occluding your airway completely.
1.1Shut in: they were occluding the waterfront with a wall of buildings
1.2Cover (an eye) to prevent its use: it is placed at eye level with one eye occluded
More example sentences
  • They fixated the center of the display while they occluded one eye with the ipsilateral hand.
  • He uses the finding of Wiesel and Hubel, that kittens reared with one eye occluded do not have binocular cells in the visual cortex, to support the converse of Hebb's postulate.
2 [no object] (Of a tooth) come into contact with another tooth in the opposite jaw: in monkeys and apes, the upper canine occludes with the lower first premolar
More example sentences
  • The peglike first upper molar does not occlude with any tooth of the lower jaw, so it serves no clear function.
  • It consists of a pair of mandibular tooth plates that occludes with two pairs of plates above.
  • The clear implication is that, at least in Idiognathodus, the teeth occluded in a regular and precise way.
3 Chemistry (Of a solid) absorb and retain (a gas or impurity): occluded within these crystals are other molecules
More example sentences
  • Could the magmatic conditions at depth allow argon to be occluded within the minerals at the time of their formation?
  • If the pore in the closed channel is occluded sterically, such a molecule should be unable to reach substituted cysteines below the gate.
  • H2O molecules can be tightly bound to biological material and are occluded in proteins where they are often involved in catalytic reactions.


Late 16th century: from Latin occludere 'shut up'.

Words that rhyme with occlude

allude, brood, collude, conclude, crude, delude, dude, elude, étude, exclude, extrude, exude, feud, food, illude, include, intrude, Jude, lewd, mood, nude, obtrude, Oudh, preclude, protrude, prude, pseud, pultrude, rood, rude, seclude, shrewd, snood, transude, unglued, unsubdued, who'd, you'd

For editors and proofreaders

Line breaks: oc|clude

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