名詞 preempt:

1. a high bid that is intended to prevent the opposing players from bidding
   同義詞：preemptive bid, pre-empt

動詞 preempt:

1. acquire for oneself before others can do so
2. take the place of or have precedence over
   同義詞：displace
3. gain possession of by prior right or opportunity, especially so as to obtain the right to buy (land)
4. make a preemptive bid in the game of bridge

1. The council found that their traffic plans had been preempted by a government decision.
   市議會發(fā)現(xiàn)他們的交通規(guī)劃已因政府先行作了決定而無法推行。

preempt 或 pre-empt

v.（動詞）
pre.empt.ed,pre.empt.ing,pre.empts
v.tr.（及物動詞）
To appropriate, seize, or take for oneself before others.See Synonyms at appropriate
預(yù)先占有：先于他人而占用、占有或據(jù)為已有參見 appropriate

To take the place of; displace:
占據(jù)…的位置；取代：
例句：
A special news program preempted the scheduled shows.
特別的新節(jié)目取代預(yù)定計劃的表演

To have precedence or predominance over:
優(yōu)先于或支配…：
例句：
Discussion of the water shortage will preempt the other topics on this week`s agenda.
在這星期日程表上關(guān)于用水短缺的討論將優(yōu)先于其它議題

To gain possession of by prior right or opportunity, especially to settle on (public land) so as to obtain the right to buy before others.
以優(yōu)先權(quán)取得：通過優(yōu)先權(quán)利或機會以獲得擁有權(quán)，尤指在（公地）上定居以此來取得先于他人的購買權(quán)
v.intr.Games （不及物動詞）【游戲】
To make a preemptive bid in bridge.
橋牌中先發(fā)制人地叫牌

來源：
Back-formation from preemption
源自 preemption的逆構(gòu)詞

【引伸】
preemp.tor.
preemp.tory