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Meaning of second-guess

sec•ond-guess

Pronunciation: (sek'und-ges'), [key]
— v.t.
  1. to use hindsight in criticizing or correcting.
  2. to predict (something) or outguess (someone): We must try to second-guess what he'll do next.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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