from The American Heritage® Dictionary of the English Language, 4th Edition

  • transitive v. To cause to become closed; obstruct: occlude an artery.
  • transitive v. To prevent the passage of: occlude light; occlude the flow of blood.
  • transitive v. Chemistry To absorb or adsorb and retain (a substance).
  • transitive v. Meteorology To force (air) upward from the earth's surface, as when a cold front overtakes and undercuts a warm front.
  • transitive v. Dentistry To bring together (the upper and lower teeth) in proper alignment for chewing.
  • intransitive v. Dentistry To close so that the cusps fit together. Used of the teeth of the upper and lower jaws.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • v. To obstruct, cover, or otherwise block an opening.

from the GNU version of the Collaborative International Dictionary of English

  • transitive v. To shut up; to close.
  • transitive v. To take in and retain; to absorb; -- said especially with respect to gases.

from The Century Dictionary and Cyclopedia

  • To shut up; close.
  • In physics and chem., to absorb: specifically applied to the absorption of a gas by a metal, such as iron, platinum, or palladium. particularly at a high temperature.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • v. block passage through


from The American Heritage® Dictionary of the English Language, 4th Edition

Latin occlūdere : ob-, intensive pref.; see ob- + claudere, to close.



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  • This is an interesting one, never heard it before.

    November 15, 2008