The Collaborative International Dictionary of English v.0.48:

Mover \Mov"er\, n.
   1. A person or thing that moves, stirs, or changes place.
      [1913 Webster]

   2. A person or thing that imparts motion, or causes change of
      place; a motor.
      [1913 Webster]

   3. One who, or that which, excites, instigates, or causes
      movement, change, etc.; as, movers of sedition.
      [1913 Webster]

            These most poisonous compounds,
            Which are the movers of a languishing death. --Shak.
      [1913 Webster]

   4. A proposer; one who offers a proposition, or recommends
      anything for consideration or adoption; as, the mover of a
      resolution in a legislative body.
      [1913 Webster]

WordNet (r) 3.0 (2006):

mover
    n 1: workman employed by a moving company; "the movers were very
         careful with the grand piano"
    2: (parliamentary procedure) someone who makes a formal motion
       [syn: proposer, mover]
    3: someone who moves
    4: a company that moves the possessions of a family or business
       from one site to another [syn: mover, public mover,
       moving company, removal firm, removal company]