The Collaborative International Dictionary of English v.0.48:

Agitate \Ag"i*tate\, v. t. [imp. & p. p. Agitated; p. pr. &
   vb. n. Agitating.] [L. agitatus, p. p. of agitare to put in
   motion, fr. agere to move: cf. F. agiter. See Act,
   Agent.]
   1. To move with a violent, irregular action; as, the wind
      agitates the sea; to agitate water in a vessel. "Winds . .
      . agitate the air." --Cowper.
      [1913 Webster]

   2. To move or actuate. [R.] --Thomson.
      [1913 Webster]

   3. To stir up; to disturb or excite; to perturb; as, he was
      greatly agitated.
      [1913 Webster]

            The mind of man is agitated by various passions.
                                                  --Johnson.
      [1913 Webster]

   4. To discuss with great earnestness; to debate; as, a
      controversy hotly agitated. --Boyle.
      [1913 Webster]

   5. To revolve in the mind, or view in all its aspects; to
      contrive busily; to devise; to plot; as, politicians
      agitate desperate designs.
      [1913 Webster]

   Syn: To move; shake; excite; rouse; disturb; distract;
        revolve; discuss; debate; canvass.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

agitating \agitating\ adj.
   1. causing or tending to cause anger or resentment.

   Syn: agitative, provoking.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

agitating
    adj 1: causing or tending to cause anger or resentment; "a
           provoking delay at the airport" [syn: agitative,
           agitating, provoking]