American English

Definition of pump noun from the Oxford Advanced American Dictionary



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  1. 1a machine that is used to force liquid, gas, or air into or out of something Some gas stations have the same kind of pump and nozzle. a gas pump a foot/hand pump (= that you work by using your foot or hand) a bicycle pump see also stomach pump
  2. 2a woman's formal shoe that is plain and does not cover the top part of the foot
  3. Idioms
    prime the pump
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    to encourage the growth of a new or weak business or industry by putting money into it
See the Oxford Advanced Learner's Dictionary entry: pump