'nippy' definitions:

Definition of 'nippy'

From: WordNet
adjective
A sharp biting taste; "a nippy cheese"
adjective
Pleasantly cold and invigorating; "crisp clear nights and frosty mornings"; "a nipping wind"; "a nippy fall day"; "snappy weather" [syn: crisp, frosty, nipping, nippy, snappy]

Definition of 'nippy'

From: GCIDE
  • nippy \nippy\ adj. Pleasantly cold and invigorating; -- of weather conditions.
  • Syn: crisp, frosty, nipping, snappy. [WordNet 1.5]

Synonyms of 'nippy'

From: Moby Thesaurus