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Meaning of self-defeating

self-de•feat•ing

Pronunciation: (self'di-fē'ting, self"-), [key]
— adj.
  1. serving to frustrate, thwart, etc., one's own intention or interests: His behavior was certainly self-defeating.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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