01 n. a member of a military force that is assigned (often with international sanction) to preserve peace in a trouble area.
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1.
a member of a military force that is assigned (often with international sanction) to preserve peace in a trouble area.
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2.
someone who keeps peace; as, she's the peacekeeper in that family.
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3.
the pistol of a law officer in the old West.[U. S. History]