definition of
[preempt]

[1] #1 preempt v. acquire for oneself before others can do so. wn

[2] #2 preempt n. [preemptive bid, pre-empt] a high bid that is intended to prevent the opposing players from bidding. wn

[3] #3 preempt v. [displace] take the place of or have precedence over; "live broadcast of the presidential debate preempts the regular news hour"; "discussion of the emergency situation will preempt the lecture by the professor". wn

[4] #4 preempt v. gain possession of by prior right or opportunity, especially so as to obtain the right to buy (land). wn

[5] #5 preempt v. make a preemptive bid in the game of bridge. wn