v. oc·clud·ed, oc·clud·ing, oc·cludes
1. To cause to become closed; obstruct: occlude an artery.
2. To prevent the passage of: occlude light; occlude the flow of blood.
3. Chemistry To absorb or adsorb and retain (a substance).
4. To force (air) upward from the earth's surface, as when a cold front overtakes and undercuts a warm front.
5. To bring together (the upper and lower teeth) in proper alignment for chewing.
To close so that the cusps fit together. Used of the teeth of the upper and lower jaws.
[Latin occlūdere : ob-, intensive pref.; see OB- + claudere, to close.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.