The Collaborative International Dictionary of English v.0.48:

Adroit \A*droit"\, a. [F. adroit; [`a] (L. ad) = droit straight,
   right, fr. L. directus, p. p. of dirigere. See Direct.]
   Dexterous in the use of the hands or in the exercise of the
   mental faculties; exhibiting skill and readiness in avoiding
   danger or escaping difficulty; ready in invention or
   execution; -- applied to persons and to acts; as, an adroit
   mechanic, an adroit reply. "Adroit in the application of the
   telescope and quadrant." --Horsley. "He was adroit in
   intrigue." --Macaulay.
   [1913 Webster]

   Syn: Dexterous; skillful; expert; ready; clever; deft;
        ingenious; cunning; ready-witted.
        [1913 Webster]

WordNet (r) 3.0 (2006):

adroit
    adj 1: quick or skillful or adept in action or thought; "an
           exceptionally adroit pianist"; "an adroit technician";
           "his adroit replies to hecklers won him many followers";
           "an adroit negotiator" [ant: maladroit]

Moby Thesaurus II by Grady Ward, 1.0:

90 Moby Thesaurus words for "adroit":
   Daedalian, adept, adroitness, apt, artful, artistic, astute,
   authoritative, brainy, bravura, bright, brilliant, canny, clean,
   clever, coordinated, crack, crackerjack, craft, cunning, cute,
   daedal, deft, deftness, dexterity, dexterous, dexterousness,
   dextrous, diplomatic, excellent, expert, expertise, fancy, gifted,
   good, goodish, graceful, handy, ingenious, intelligent, keen,
   keen-witted, know-how, magisterial, masterful, masterly, neat,
   neat-handed, nimble, nimble-witted, no dumbbell, no mean,
   not born yesterday, perspicacious, politic, pretty, professional,
   proficient, prowess, quick, quick-thinking, quick-witted,
   quite some, readiness, ready, resourceful, scintillating, sharp,
   sharp-witted, shrewd, skill, skillful, sleight, slick, slim, sly,
   smart, some, statesmanlike, steel-trap, stylish, subtle, tactful,
   talented, the compleat, the complete, virtuoso, well-done, wicked,
   workmanlike