Source : Webster's Revised Unabridged Dictionary (1913)

Invigorate \In*vig"or*ate\, v. t. [imp. & p. p. {Invigorated};
   p. pr. & vb. n. {Invigorating}.] [Pref. in- in + vigor.]
   To give vigor to; to strengthen; to animate; to give life and
   energy to.

         Christian graces and virtues they can not be, unless
         fed, invigorated, and animated by universal charity.
                                                  --Atterbury.

   Syn: To refresh; animate; exhilarate; stimulate.

Source : WordNet®

invigorate
     v 1: heighten or intensify; "These paintings exalt the
          imagination" [syn: {inspire}, {animate}, {enliven}, {exalt}]
     2: give life or energy to; "The cold water invigorated him"
        [syn: {quicken}]
     3: make lively; "let's liven up this room a bit" [syn: {enliven},
         {liven}, {liven up}, {animate}] [ant: {deaden}]
     4: impart vigor, strength, or vitality to; "Exercise is
        invigorating" [syn: {reinvigorate}]