WordWeb Online

1. Marked by up-to-dateness in dress and manners
   "a jaunty red hat";
   - dapper, dashing, natty [informal], raffish, rakish, spiffy [N. Amer, informal], snappy [informal], spruce, pert
    
2. Having a cheerful, lively, and self-confident air
   "walked with a jaunty step"; "a jaunty optimist";
   - chipper, debonair, debonaire

Derived forms: jauntier, jauntiest

See also: cheerful, fashionable, hip [informal], stylish

Encyclopedia: Jaunty