(see pic above) An "out" which is made by the catcher/wicket-keeper, catching the batter out of his ground when he is trying to hit...and misses..

adj. describing the method of getting out in which the batsman steps out of his crease to play a ball, misses it, and the wicket-keeper collects the ball and breaks his wicket before he returns to his crease. 2. adj. (of a batsman) having been out stumped. 3. v.t. (of a wicket-keeper) to have got a batsman out stumped.