Wordnet 3.0
ADJECTIVE (1)
1. 
 in the same direction as the rotating hands of a clock; 
ADVERB (1)
1. 
 in the direction that the hands of a clock move; 
- Example: "please move clockwise in a circle"
The Collaborative International Dictionary of English v.0.48:
clockwise \clockwise\ adj.
   1. -- of rotatory motion. dextral
      [WordNet 1.5]
The Collaborative International Dictionary of English v.0.48:
clockwise \clock"wise`\, a. & adv.
   in the same direction as the hands of a clock rotate, as
   viewed from in front of the clock face; -- said of that
   direction of a rotation about an axis, or about a point in a
   plane, which is ordinarily reckoned negative. Also said of
   the direction of a spiral, in which case the term
   right-handed is more common. Opposite of
   counterclockwise, and left-handed.
   Syn: right-handed, dextrorotary, dextrorotatory.
        [Webster 1913 Suppl.]
WordNet (r) 3.0 (2006):
clockwise
    adv 1: in the direction that the hands of a clock move; "please
           move clockwise in a circle" [ant: anticlockwise,
           counterclockwise]
    adj 1: in the same direction as the rotating hands of a clock
           [ant: anticlockwise, contraclockwise,
           counterclockwise]
Moby Thesaurus II by Grady Ward, 1.0:
41 Moby Thesaurus words for "clockwise":
   anticlockwise, around, conservative, counterclockwise, dexter,
   dextral, dextrocardial, dextrocerebral, dextrocular, dextrogyrate,
   dextrogyratory, dextropedal, dextrorotary, dextrorse, earthward,
   head over heels, heavenward, heels over head, homeward,
   in a circle, in a spin, in a whirl, in circles, landward, leeward,
   leftward, off, positive, reactionary, right, right-hand,
   right-wing, right-wingish, rightward, round, round about,
   round and round, seaward, starboard, widdershins, windward