preempt (Noun) — A high bid that is intended to prevent the opposing players from bidding.
preempt (Verb) — Take the place of or have precedence over. ex. "discussion of the emergency situation will preempt the lecture by the professor" ex. "live broadcast of the presidential debate preempts the regular news hour"
preempt (Verb) — (bridge) make a preemptive bid in the game of bridge.
preempt (Verb) — Gain possession of by prior right or opportunity, especially so as to obtain the right to buy (land).
preempt (Verb) — Acquire for oneself before others can do so.