What does the word whiff mean?

Usage examples for whiff

  1. He blew it away in a whiff of scorn. – Miss Theodosia's Heartstrings by Annie Hamilton Donnell
  2. So they had a very merry luncheon, though an occasional whiff of guilt made Joy fall silent- which was not noticeable, because Philip's conversation flowed on brightly in all the breaks, and sometimes when there weren't any. – The Wishing-Ring Man by Margaret Widdemer