Definitions of pump:

• noun:   a mechanical device that moves fluid or gas by pressure or suction
• noun:   a low-cut shoe without fastenings
• noun:   the hollow muscular organ located behind the sternum and between the lungs; its rhythmic contractions pump blood through the body
• verb:   flow intermittently
• verb:   supply in great quantities

  Example: "Pump money into a project"

• verb:   question persistently

  Example: "She pumped the witnesses for information"

• verb:   deliver forth

  Example: "Pump bullets into the dummy"

• verb:   operate like a pump; move up and down, like a handle or a pedal
• verb:   raise (gases oor fluids) with a pump
• verb:   move up and down

  Example: "The athlete pumps weights in the gym"

• verb:   draw or pour with a pump
• name:  A surname (very rare: popularity rank in the U.S.: #45806)