atmosphere

1. (figuratively) The conditions (such as music, illumination etc.) that can influence the mood felt in an environment.Synonyms: air, ambiancecountablefigurativelyuncountable

2. (figuratively) The apparent mood felt in an environment.Examples: "The atmosphere for the football match was great."; "For by the hearth the children sit ⁠Cold in that atmosphere of Death, ⁠And scarce endure to draw the breath, Or like to noiseless phantoms flit: […]"; "Oh, what an atmosphere / I love a party with a happy atmosphere"Synonyms: feeling, moodcountablefigurativelyuncountable

3. (television, film, uncountable) Extras in a scene who have no spoken lines.Examples: "Central Casting is in the business of extras, also known as atmosphere or background actors […]"; ""It is estimated conservatively that there are some 50,000 would-be film extras in and around the celluloid capital, persons who would jump at the opportunity to appear as atmosphere in pictures," Scott concluded."; "By the way, I discovered that we were not extras but background, as far as the director was concerned; and for the producer, we were atmosphere."uncountable