American English

Definition of atmosphere noun from the Oxford Advanced American Dictionary

      

    atmosphere

     noun
    noun
    NAmE//ˈætməsˌfɪr//
     
     
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  1. 1the atmosphere [singular] the mixture of gases that surrounds the earth the upper atmosphere pollution of the atmosphere
  2. 2[countable] a mixture of gases that surrounds another planet or a star Saturn's atmosphere
  3. 3 [countable] the air in a room or in a small space; the air around a place a smoky/stuffy atmosphere These plants love warm, humid atmospheres.
  4. 4 [countable, uncountable] the feeling or mood that you have in a particular place or situation; a feeling between two people or in a group of people a party atmosphere The hotel offers a friendly atmosphere and personal service. Use music and lighting to create a romantic atmosphere. There was an atmosphere of mutual trust between them. The children grew up in an atmosphere of love and happiness. The old house is full of atmosphere (= it's very interesting).
  5. Idioms
    a heavy silence/atmosphere
     
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    a situation when people do not say anything, but feel embarrassed or uncomfortable
See the Oxford Advanced Learner's Dictionary entry: atmosphere