1. a strike by a missile that is not a direct hit but is close enough to damage the target.
2. an instance of two vehicles, aircraft, etc., narrowly avoiding a collision.
3. something that falls narrowly short of its object or of success: an interesting movie, but a near miss. Also,near'-miss'.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.