The Collaborative International Dictionary of English v.0.48:

Locomotion \Lo`co*mo"tion\, n. [L. locus place + motio motion:
   cf. F. locomotion. See Local, and Motion.]
   1. The act of moving from place to place. " Animal
      locomotion." --Milton.
      [1913 Webster]

   2. The power of moving from place to place, characteristic of
      the higher animals and some of the lower forms of plant
      life.
      [1913 Webster]

   3. The name of a song and a dance, briefly popular in the
      1960's; as, do the locomotion.
      [PJC]

WordNet (r) 3.0 (2006):

locomotion
    n 1: the power or ability to move [syn: locomotion, motive
         power, motivity]
    2: self-propelled movement [syn: locomotion, travel]