Source : Webster's Revised Unabridged Dictionary (1913)

Actuate \Ac"tu*ate\, v. t. [imp. & p. p. {Actuated}; p. pr. &
   vb. n. {Actuating}.] [LL. actuatus, p. p. of actuare, fr. L.
   actus act.]
   1. To put into action or motion; to move or incite to action;
      to influence actively; to move as motives do; -- more
      commonly used of persons.

            Wings, which others were contriving to actuate by
            the perpetual motion.                 --Johnson.

            Men of the greatest abilities are most fired with
            ambition; and, on the contrary, mean and narrow
            minds are the least actuated by it.   --Addison.

   2. To carry out in practice; to perform. [Obs.] ``To actuate
      what you command.'' --Jer. Taylor.

   Syn: To move; impel; incite; rouse; instigate; animate.

Source : WordNet®

actuating
     adj : causing motion or action or change [syn: {activating(a)}, {actuating(a)}]