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English definition of “nebula”

nebula

noun [C]  /ˈneb·jə·lə/ (plural -las or -lae  /ˈneb·jə·li, -ˌlɑɪ/) us  
earth science a cloud of dust or gas in outer space: The Orion Nebula is visible to the naked eye under dark skies.
nebular
adjective [not gradable]  /ˈneb·jə·lər/ earth science us  
(Definition of nebula from the Cambridge Academic Content Dictionary © Cambridge University Press)
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