• præemption, præ-emption (archaic)
• pre-emption
• preëmption

From Medieval Latin praeēmptiō (“previous purchase”), from praeemō (“buy before”), from Latin prae- (“before”) + emō (“buy”).

• IPA^(key): /priːˈɛmpʃən/

• Audio (US):

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preemption (countable and uncountable, plural preemptions)

1. An act or process that preempts; a preventive or forestalling action; as:
   1. The purchase of something before it is offered for sale to others.
   2. The purchase of public land by the occupant.
   3. (computing) The temporary interruption of a task without its cooperation and with the intention of resuming it at a later time.
   4. (law) The supersession of a conflicting law from a lower jurisdiction by an overlapping law from a higher jurisdiction.

      Synonym: occupancy

• “preemption”, in OneLook Dictionary Search.

• peremption