American English

Definition of go by phrasal verb from the Oxford Advanced American Dictionary

 

go by

 phrasal verb
phrasal verb
 
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Phrasal Verbs
(of time) to pass Things will get easier as time goes by. The weeks went slowly by.

go by something

 
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to be guided by something; to form an opinion from something That's a good rule to go by. If past experience is anything to go by, they'll be late.
See the Oxford Advanced Learner's Dictionary entry: go by