D defs.my
Entry 4 senses Webster, 1913

Preëmpt

/(prē̇*ĕmt"; 215)/ · Pre·ëmpt · IPA /pɹiːˈɛmpt/
01 v. t. & i. To settle upon (public land) with a right of preemption, as under the laws of the United States; to take by preemption.
imp. & p. p. Preëmpted; p. pr. & vb. n. Preëmpting
  1. 1.
    To settle upon (public land) with a right of preemption, as under the laws of the United States; to take by preemption.
  2. 2.
    To acquire or take for oneself first (an object or right), thereby preventing others from acquiring; to appropriate; to arrogate.
  3. 3.
    To supplant or take the place of (an action), due to changes in circumstances or priorities; as, the regular meeting was preempted by an emergency conference.
  4. 4.
    To prevent or delay (an event) by acting beforehand; to head off; to preclude.