Source : Webster's Revised Unabridged Dictionary (1913)

Glad \Glad\, v. t. [imp. & p. p. {Gladded}; p. pr. & vb. n.
   {Gladding}.] [AS. gladian. See {Glad}, a., and cf. {Gladden},
   v. t.]
   To make glad; to cheer; to gladden; to exhilarate. --Chaucer.

         That which gladded all the warrior train. --Dryden.

         Each drinks the juice that glads the heart of man.
                                                  --Pope.

Glad \Glad\, a. [Compar. {Gladder}; superl. {Gladdest}.] [AS.
   gl[ae]d bright, glad; akin to D. glad smooth, G. glatt, OHG.
   glat smooth, shining, Icel. gla?r glad, bright, Dan. & Sw.
   glad glad, Lith. glodas smooth, and prob. to L. glaber, and
   E. glide. Cf. {Glabrous}.]
   1. Pleased; joyous; happy; cheerful; gratified; -- opposed to
      sorry, sorrowful, or unhappy; -- said of persons, and
      often followed by of, at, that, or by the infinitive, and
      sometimes by with, introducing the cause or reason.

            A wise son maketh a glad father.      --Prov. x. 1.

            He that is glad at calamities shall not be
            unpunished.                           --Prov. xvii.
                                                  5.

            The Trojan, glad with sight of hostile blood.
                                                  --Dryden.

            He, glad of her attention gained.     --Milton.

            As we are now glad to behold your eyes. --Shak.

            Glad am I that your highness is so armed. --Shak.

   {Glad on 't}, glad of it. [Colloq.] --Shak.

   2. Wearing a gay or bright appearance; expressing or exciting
      joy; producing gladness; exhilarating.

            Her conversation More glad to me than to a miser
            money is.                             --Sir P.
                                                  Sidney.

            Glad evening and glad morn crowned the fourth day.
                                                  --Milton.

   Syn: Pleased; gratified; exhilarated; animated; delighted;
        happy; cheerful; joyous; joyful; cheering; exhilarating;
        pleasing; animating.

   Usage: {Glad}, {Delighted}, {Gratified}. Delighted expresses
          a much higher degree of pleasure than glad. Gratified
          always refers to a pleasure conferred by some human
          agent, and the feeling is modified by the
          consideration that we owe it in part to another. A
          person may be glad or delighted to see a friend, and
          gratified at the attention shown by his visits.

Glad \Glad\, v. i.
   To be glad; to rejoice. [Obs.] --Massinger.

Source : WordNet®

glad
     adj 1: showing or causing joy and pleasure; especially made happy;
            "glad you are here"; "glad that they succeeded"; "gave
            a glad shout"; "a glad smile"; "heard the glad news";
            "a glad occasion" [ant: {sad}]
     2: (`lief' is archaic) very willing; "was lief to go"; "glad to
        help" [syn: {lief(p)}]
     3: feeling happy appreciation; "glad of the fire's warmth"
     4: cheerful and bright; "a beaming smile"; "a glad May morning"
        [syn: {beaming}]
     [also: {gladdest}, {gladder}]