Pronunciation: (out"thingk'), [key]
—v.t., -thought, -think•ing.
1. to excel in thinking; think faster, more accurately, or more perceptively than: outthinking most of her contemporaries in the field of human relations.
2. to get the advantage of (someone) by quick or clever thinking; outwit: only a split second to outthink his opponent.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.