Meaning of prevent

pre•vent

Pronunciation: (pri-vent'), [key]
— v.t.
  1. to keep from occurring; avert; hinder: He intervened to prevent bloodshed.
  2. to hinder or stop from doing something: There is nothing to prevent us from going.
  3. to act ahead of; forestall.
  4. to precede.
  5. to anticipate.
—v.i.
  1. to interpose a hindrance: He will come if nothing prevents.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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