|Origin:||atmosphaera, from Greek atmos 'liquid in the air, vapor' + Latin sphaera 'sphere'|
1 [uncountable and countable]
the feeling that an event or place gives you:
The hotel had a lovely relaxed atmosphere.
The atmosphere at home was rather tense.
An atmosphere of optimism dominated the conference.
if a place or event has atmosphere, it is interesting:
The castle was centuries old and full of atmosphere.
The match was lacking in atmosphere.
the mixture of gases that surrounds the Earth
the mixture of gases that surround a planet
5 [countable usually singular]
the air inside a room:
a smoky atmosphere