Bonhomie
/ˌbɑːnəˈmiː/
Definition 1 of 1
Pro Tip 1/3Positive Atmosphere
Used to describe a warm, pleasant social environment. Suggests feelings of happiness shared among people. 
The holiday gathering was full of bonhomie, everyone laughing and chatting together warmly.
Pro Tip 2/3Informal Use
Mostly used in casual or informal settings when describing friendly interactions. 
At the small-town market, vendors greeted customers with a sense of bonhomie.
Pro Tip 3/3Not Surface-Level
Indicates genuine friendliness, and not merely polite or superficial behavior. 
Even after years, the childhood friends greeted each other with unchanged bonhomie.