The Collaborative International Dictionary of English v.0.48:

Perky \Perk"y\, a.
   Perk; pert; jaunty; trim.
   [1913 Webster]

         There amid perky larches and pines.      --Tennyson.
   [1913 Webster]

WordNet (r) 3.0 (2006):

perky
    adj 1: characterized by liveliness and lightheartedness;
           "buoyant spirits"; "his quick wit and chirpy humor";
           "looking bright and well and chirpy"; "a perky little
           widow in her 70s" [syn: buoyant, chirpy, perky]

Moby Thesaurus II by Grady Ward, 1.0:

71 Moby Thesaurus words for "perky":
   active, activist, activistic, aggressively self-confident, airy,
   alive, animated, biggety, bouncing, bouncy, breezy, bright,
   bright-eyed and bushy-tailed, brisk, bubbly, bumptious, buoyant,
   carefree, cheerful, cheery, chesty, chipper, cocky, conceited,
   corky, debonair, ebullient, effervescent, energetic, free and easy,
   frisky, full of go, full of life, full of pep, gay, immodest,
   invigorated, jaunty, know-it-all, light, lighthearted, lightsome,
   live, lively, mercurial, militant, obtrusive, overwise, peacockish,
   peacocky, peppy, perk, pert, puffed up, quicksilver, resilient,
   self-conceited, self-opinionated, smacking, smart-alecky, snappy,
   spanking, spirited, sprightly, spry, stuck-up, swelled-headed,
   vigorous, vitalized, vivacious, zingy