Source : Webster's Revised Unabridged Dictionary (1913)

Perk \Perk\, v. t. [imp. & p. p. {Perked}; p. pr. & vb. n.
   {Perking}.] [Cf. W. percu to trim, to make smart.]
   To make trim or smart; to straighten up; to erect; to make a
   jaunty or saucy display of; as, to perk the ears; to perk up
   one's head. --Cowper. Sherburne.

Perk \Perk\, v. i.
   To exalt one's self; to bear one's self loftily. ``To perk
   over them.'' --Barrow.

   {To perk it}, to carry one's self proudly or saucily. --Pope.

Perk \Perk\, a.
   Smart; trim; spruce; jaunty; vain. ``Perk as a peacock.''
   --Spenser.

Perk \Perk\, v. i.
   To peer; to look inquisitively. --Dickens.

Source : WordNet®

perk
     n : an incidental benefit awarded for certain types of
         employment (especially if it is regarded as a right); "a
         limousine is one of the fringe benefits of the job" [syn:
          {fringe benefit}, {perquisite}]

perk
     v : gain or regain energy; "I picked up after a nap" [syn: {perk
         up}, {percolate}, {pick up}, {gain vigor}]