Source : Webster's Revised Unabridged Dictionary (1913)

Pert \Pert\, v. i.
   To behave with pertness. [Obs.] --Gauden.

Pert \Pert\, a. [An aphetic form of OE. & OF. apert open, known,
   true, free, or impudent. See {Apert}.]
   1. Open; evident; apert. [Obs.] --Piers Plowman.

   2. Lively; brisk; sprightly; smart. [Obs.] --Shak.

   3. Indecorously free, or presuming; saucy; bold; impertinent.
      ``A very pert manner.'' --Addison.

            The squirrel, flippant, pert, and full of play.
                                                  --Cowper.

Source : WordNet®

pert
     adj : characterized by a lightly pert and exuberant quality; "a
           certain irreverent gaiety and ease of manner" [syn: {impertinent},
            {irreverent}, {saucy}]

Source : Free On-Line Dictionary of Computing

PERT
     
        {Program Evaluation and Review Technique}