Source : Webster's Revised Unabridged Dictionary (1913)

Pleasant \Pleas"ant\, n.
   A wit; a humorist; a buffoon. [Obs.]

Pleasant \Pleas"ant\, a. [F. plaisant. See {Please}.]
   1. Pleasing; grateful to the mind or to the senses;
      agreeable; as, a pleasant journey; pleasant weather.

            Behold, how good and pleasant it is for brethren to
            dwell together in unity!              --Ps. cxxxiii.
                                                  1.

   2. Cheerful; enlivening; gay; sprightly; humorous; sportive;
      as, pleasant company; a pleasant fellow.

            From grave to light, from pleasant to serve.
                                                  --Dryden.

   Syn: Pleasing; gratifying; agreeable; cheerful; good-humored;
        enlivening; gay; lively; merry; sportive; humorous;
        jocose; amusing; witty.

   Usage: {Pleasant}, {Pleasing}, {Agreeable}. Agreeable is
          applied to that which agrees with, or is in harmony
          with, one's tastes, character, etc. Pleasant and
          pleasing denote a stronger degree of the agreeable.
          Pleasant refers rather to the state or condition;
          pleasing, to the act or effect. Where they are applied
          to the same object, pleasing is more energetic than
          pleasant; as, she is always pleasant and always
          pleasing. The distinction, however, is not radical and
          not rightly observed.

Source : WordNet®

pleasant
     adj 1: affording pleasure; being in harmony with your taste or
            likings; "a pleasant person to be around"; "we had a
            pleasant evening together"; "a pleasant scene";
            "pleasant sensations" [ant: {unpleasant}]
     2: pleasant in manner or behavior; "I didn`t enjoy it and
        probably wasn't a pleasant person to be around"