Definition of preempt

< preeminent

preemption >

pre·empt or pre-empt    (pr-mpt) KEY 

VERB:
pre·empt·ed, pre·empt·ing, pre·empts
VERB:
tr.

1. To appropriate, seize, or take for oneself before others. See Synonyms at appropriate.
2. 1. To take the place of; displace: A special news program preempted the scheduled shows.
   2. To have precedence or predominance over: Discussion of the water shortage will preempt the other topics on this week's agenda.
3. 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.

VERB:
intr.
Games

To make a preemptive bid in bridge.

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ETYMOLOGY:
Back-formation from preemption

OTHER FORMS:
pre·emptor  (-mptôr) KEY (Noun), pre·empto·ry  (-mpt-r) KEY (Adjective)