Definition of Gaia noun from the Oxford Advanced Learner's Dictionary

 

Gaia

 noun
noun
BrE BrE//ˈɡaɪə//
 
; NAmE NAmE//ˈɡaɪə//
 
[singular] Conservation
 
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the Earth, considered as a single natural system which organizes and controls itself See related entries: Conservation Word OriginGreek, ‘Earth’. This sense was coined by James Lovelock, at the suggestion of the writer William Golding.
See the Oxford Advanced American Dictionary entry: Gaia