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tr.v. ex·tin·guished, ex·tin·guish·ing, ex·tin·guish·es
1. To cause (a fire or light) to stop burning or shining; put out.
2. To put an end to or make extinct; destroy: "Her death extinguished the dream of family that was closest to his heart" (Karen Lystra). See Synonyms at annihilate.
3. Psychology To bring about the extinction of (a conditioned response).
[Latin exstinguere : ex-, intensive pref.; see ex- + stinguere, to quench; see steig- in Indo-European roots.]