To appropriate first.
He preempted that hill to be its king.
To displace or take the place of (by having higher precedence, etc).
Floppy disks were preempted by CDs.
To prevent or beat to the punch, to forestall an expected occurrence by acting first.
By his statement, the Secretary-General had effectively preempted the usual frustrating debates over questions of fact and law.
A preemptive bid.
Back-formation from preemption.
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