a to acquire (land) by preemption
   b to seize upon to the exclusion of others take for oneself

  • a senior user of a trademark could not preempt use of the mark in remote geographical markets
  •  —Mesa Springs Enterprises v. Cutco Indus., 736 P.2d 1251 (1986)
2  a to replace or supersede (a law) by preemption

  • such state laws are not preempted by the federal Energy Reorganization Act of 1974
  •  —National Law Journal
   b to preclude or bar (an action) by preemption

  • federal airline deregulation does not preempt claims under state contract law
  •  —National Law Journal