atmosphere
atmos ‘vapor’ + sphaira ‘ball, globe’(sphere)
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noun usually in singular
1. the envelope of gases surrounding the earth or another planet:
(天体を取り巻く)大気; 〖the ～〗 (地球の)大気(圏)
e.g. part of the sun's energy is absorbed by the earth's atmosphere.
the air in any particular place:
(特定の場所の)空気
e.g. we couldn't breathe in the dusty atmosphere of his apartment.
(abbreviation atm) Physics a unit of pressure equal to mean atmospheric pressure at sea level, 101,325 pascals.
〘物理〙 気圧〘大気圧の単位; ｟略｠ atm〙
2. the pervading tone or mood of a place, situation, or work of art:
〖具体例ではan (...) ～〗 雰囲気, 環境
e.g. the hotel is famous for its friendly, welcoming atmosphere
e.g. this crisis further compounded the prevailing atmosphere of gloom.
a pleasurable and interesting or exciting mood:
(場所･出来事などの持つ良い)ムード, 趣
e.g. a superb restaurant, full of atmosphere.
ORIGIN
mid 17th century: from modern Latin atmosphaera, from Greek atmos ‘vapor’ + sphaira ‘ball, globe’.