'gaffe' definitions:

Definition of 'gaffe'

From: WordNet
noun
A socially awkward or tactless act [syn: faux pas, gaffe, solecism, slip, gaucherie]

Definition of 'gaffe'

From: GCIDE
  • gaffe \gaffe\ (g[a^]f), n. A socially awkward or tactless act.
  • Syn: faux-pas, solecism, slip, gaucherie. [WordNet 1.5]