Source : Webster's Revised Unabridged Dictionary (1913)

Adept \A*dept"\, n. [L. adeptus obtained (sc. artem), ?he who
   has obtained an art, p. p. of adipsci to arrive ?at, to
   obtain; ad + apisci to pursue. See {Apt}, and cf. {Adapt}.]
   One fully skilled or well versed in anything; a proficient;
   as, adepts in philosophy.

Adept \A*dept"\, a.
   Well skilled; completely versed; thoroughly proficient.

         Beaus adept in everything profound.      --Cowper.

Source : WordNet®

adept
     adj : having or showing knowledge and skill and aptitude; "adept
           in handicrafts"; "an adept juggler"; "an expert job";
           "a good mechanic"; "a practiced marksman"; "a
           proficient engineer"; "a lesser-known but no less
           skillful composer"; "the effect was achieved by
           skillful retouching" [syn: {expert}, {good}, {practiced},
            {proficient}, {skillful}, {skilful}]
     n : someone who is dazzlingly skilled in any field [syn: {ace},
         {champion}, {sensation}, {maven}, {mavin}, {virtuoso}, {genius},
          {hotshot}, {star}, {superstar}, {whiz}, {whizz}, {wizard},
          {wiz}]