preemption

US:USA pronunciation: respellingUSA pronunciation: respelling(prē emp′shən)

pre•emp•tion (prē emp′shən),USA pronunciation n.

Also, pre-emp′tion.

Medieval Latin praeëmpt(us) bought beforehand (past participle of praeëmere) + -ion. See pre-, emptor
1595–1605

pre•empt or pre-empt /priˈɛmpt/USA pronunciation v. [~ + object]

to acquire (something) before someone else;
take for oneself.
to take the place of by being more important, or because of rescheduling, etc.;
supplant:A special news report on the earthquake preempted the game show.
to prevent (something anticipated) by acting first;
head off:The rival company preempted our takeover bid by selling its stock.

pre•emp•tion, n. [uncountable]

pre•empt (prē empt′),USA pronunciation v.t.

to occupy (land) in order to establish a prior right to buy.
to acquire or appropriate before someone else; take for oneself;
arrogate:a political issue preempted by the opposition party.
to take the place of because of priorities, reconsideration, rescheduling, etc.;
supplant:The special newscast preempted the usual television program.

v.i.

Games[Bridge.]to make a preemptive bid.
to forestall or prevent (something anticipated) by acting first;
preclude;
head off:an effort to preempt inflation.

Also, pre-empt′.

pre•emp′ti•ble, adj.

Collins Concise English Dictionary © HarperCollins Publishers::

pre-emption /prɪˈɛmpʃən/ n

the purchase of or right to purchase property in advance of or in preference to others
the right of a government to intercept and seize for its own purposes goods or property of the subjects of another state while in transit, esp in time of war

Etymology: 16th Century: from Medieval Latin praeemptiō, from praeemere to buy beforehand, from emere to buy

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