1. Verb.  (transitive) to put out, as in fire; to end burning; to quench.
  2. Verb.  (transitive) to destroy or abolish something.
  3. Verb.  (transitive) to obscure or eclipse something.
  4. Verb.  (transitive, psychology) to bring about the extinction of a conditioned reflex.
  5. Verb.  (transitive, literally) to hunt down (a species) to extinction.

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This entry was last updated on RefTopia from its source on 3/20/2012.