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Pump

pʌmp

Pump definitions
noun
pump pumps
  1. a mechanical device using suction or pressure to raise or move liquids, compress gases, or force air into inflatable objects such as tyres

    "a petrol pump"

    • an instance of moving something by or as if by a pump

      "the pump of blood to her heart"

  2. an active transport mechanism in living cells by which specific ions are moved through the cell membrane against a concentration gradient

    "the bacterium's sodium pump"

  3. a pump-action shotgun

    "the shotgun was a 12-gauge pump"

verb
pump pumped pumping pumps
  1. force (liquid, gas, etc.) to move by or as if by means of a pump

    "the blood is pumped around the body"

    • move in spurts as though driven by a pump

      "blood was pumping from a wound in his shoulder"

    • draw (milk) from the breast using a breast pump, typically in order to feed a baby by means of a bottle

      "she struggled with pumping enough milk"

  2. fill (something such as a tyre or balloon) with liquid or gas using a pump

    "I pumped the tyres and oiled the chain"

    inflate blow up
    • shoot (bullets) into (a target)

      "he pumped two shots into the van's front tyre"

  3. move vigorously up and down

    "we had to pump the handle like mad"

    • apply and release (a brake pedal or lever) several times in quick succession, typically to prevent skidding

      "the school teaches its students to brake by pumping the pedal"

  4. try to elicit information from (someone) by persistent questioning

    "she began to pump her friend for details"

    ask question (persistently/intensely) quiz interrogate probe put questions to sound out cross-examine catechize