a pleasant and affable disposition; good-natured easy friendliness

The wonderful Canadian band Broken Social Scene use the (original) French spelling of this word in the song title, “I Slept with the Bonhomme at the CBC.” Also, the word appears in Kate Atkinson’s novel Case Histories: Theo had stood in the boardroom many times, sharing a glass of wine with his partners and associates, all of them full of the provincial bonhomie of successful professionals.