Definition of revolve around phrasal verb from the Oxford Advanced American Dictionary

 

revolve around

 phrasal verb
phrasal verb
 
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Phrasal Verbs

revolve around something

 
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to move around something in a circle The earth revolves around the sun.

revolve around somebody/something

 
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to have someone or something as the main interest or subject His whole life revolves around surfing. She thinks that the world revolves around her. The discussion revolved around the question of changing the team's name.
See the Oxford Advanced Learner's Dictionary entry: revolve around