Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “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.
adjective [not gradable]  /ˈneb·jə·lər/ earth science us  
(Definition of nebula from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of nebula?
Add Cambridge dictionaries to your browser to your website

Definitions of “nebula” in other dictionaries

Translations of “nebula”

Word of the Day


When birds roost, they go somewhere to rest or sleep.

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More