Connor Creagan atmosphere at⋅mos⋅phere [at-muhs-feer] –noun 1. the gaseous envelope surrounding the earth; the air. 2. this medium at a given place. 3. a surrounding or pervading mood, environment, or influence: an atmosphere of impending war; a very tense atmosphere. 4. the dominant mood or emotional tone of a work of art, as of a play or novel: the chilly atmosphere of a ghost story. 5. a distinctive quality, as of a place; character: The old part of town has lots of atmosphere. a home a b c d e f g h i j k l m n o p q r s t u v w x y z ascent asleep assassin astray atmosphere autumn avert away