Top Definition
1. To do something before someone does something else (probably the thing that you are about to do to them) to you

2. To remove a television or other similar program from its regular airing temporarily.
1. The US decided to pre empt a strike on its soil by Iraq by striking them first.

2. The NFL has pre empted King of the Hill...again.
by dsaus April 11, 2007
5 Words related to pre empt

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