The Collaborative International Dictionary of English v.0.48:

Lift \Lift\, n.
   1. Act of lifting; also, that which is lifted.
      [1913 Webster]

   2. The space or distance through which anything is lifted;
      as, a long lift. --Bacon.
      [1913 Webster]

   3. Help; assistance, as by lifting. Hence: A ride in a
      vehicle, given by the vehicle's owner to another person as
      a favor -- usually in "give a lift" or "got a lift"; as,
      to give one a lift in a wagon; Jack gave me a lift into
      town. [Colloq.]
      [1913 Webster +PJC]

            The goat gives the fox a lift.        --L'Estrange.

   4. That by means of which a person or thing lifts or is
      lifted; as:
      (a) A hoisting machine; an elevator; a dumb waiter.
          [Chiefly Brit.]
      (b) An exercising machine.
          [1913 Webster]

   5. A rise; a degree of elevation; as, the lift of a lock in
      canals.
      [1913 Webster]

   6. A lift gate. See Lift gate, below. [Prov. Eng.]
      [1913 Webster]

   7. (Naut.) A rope leading from the masthead to the extremity
      of a yard below; -- used for raising or supporting the end
      of the yard.
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   8. (Mach.) One of the steps of a cone pulley.
      [1913 Webster]

   9. (Shoemaking) A layer of leather in the heel.
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   10. (Horology) That portion of the vibration of a balance
       during which the impulse is given. --Saunier.
       [1913 Webster]

   11. A brightening of the spirits; encouragement; as, the
       campaign workers got a lift from the President's
       endorsement.
       [PJC]

   Dead lift. See under Dead. --Swift.

   Lift bridge, a kind of drawbridge, the movable part of
      which is lifted, instead of being drawn aside.

   Lift gate, a gate that is opened by lifting.

   Lift hammer. See Tilt hammer.

   Lift lock, a canal lock.

   Lift pump, a lifting pump.

   Lift tenter (Windmills), a governor for regulating the
      speed by adjusting the sails, or for adjusting the action
      of grinding machinery according to the speed.

   Lift wall (Canal Lock), the cross wall at the head of the
      lock.
      [1913 Webster]

WordNet (r) 3.0 (2006):

lift pump
    n 1: pump used to lift rather than force a liquid up