Source : Webster's Revised Unabridged Dictionary (1913)

Pat \Pat\, v. t. [imp. & p. p. {Patted}; p. pr. & vb. n.
   {Patting}.] [Cf. G. patschen, Prov. G. patzen, to strike,
   tap.]
   To strike gently with the fingers or hand; to stroke lightly;
   to tap; as, to pat a dog.

         Gay pats my shoulder, and you vanish quite. --Pope.

Source : WordNet®

pat
     adj 1: having only superficial plausibility; "glib promises"; "a
            slick commercial" [syn: {glib}, {slick}]
     2: exactly suited to the occasion; "a pat reply"
     [also: {patting}, {patted}]

pat
     n 1: the sound made by a gentle blow [syn: {rap}, {tap}]
     2: a light touch or stroke [syn: {tap}, {dab}]
     [also: {patting}, {patted}]

pat
     adv : completely or perfectly; "he has the lesson pat"; "had the
           system down pat"
     [also: {patting}, {patted}]

pat
     v 1: pat or squeeze fondly or playfully, especially under the
          chin [syn: {chuck}]
     2: hit lightly; "pat him on the shoulder" [syn: {dab}]
     [also: {patting}, {patted}]

patted
     See {pat}