Preemption or pre-emption may refer to:
Legal FDA preemption, legal theory in the United States that exempts product manufacturers from tort claims regarding Food and Drug Administration approved products Federal preemption, displacement of U.S. state law by U.S. Federal law Pre-emption rights, the right of existing shareholders in a company to buy shares offered for sale before they are offered to the public Preemption (land), a type of land transfer in the United States, as in the Preemption Act of 1841 Preemption Line, the line dividing Indian lands awarded to New York, from those awarded to the Commonwealth of Massachusetts in 1786 State preemption, displacement of U.S. municipal law by state law
Other Preempt, a type of bid and a bidding tactic in contract bridge Preemption (computing), the interruption of a computer process without its cooperation in order to perform another task Preemption, Illinois, a CDP in the township Preemption Township, Mercer County, Illinois Preemptive war or preemptive strike Traffic signal preemption Preemption (media), also known as a blackout in broadcasting