adjective 1.of or pertaining to preemption.
2.taken as a measure against something possible, anticipated, or feared; preventive; deterrent: a preemptive tactic against a ruthless business rival.
3.preempting or possessing the power to
preempt; appropriative; privileged:
a commander's preemptive authority. 4.Bridge. pertaining to, involving, or noting an opening bid or an overcall in a suit that is at an unnecessarily high level and that is essentially a defensive maneuver designed to make communication between one's opponents more difficult: a preemptive bid; to give a preemptive response.
Also, pre-emp·tive.
Related forms pre·emp·tive·ly, adverb