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Definition of by- prefix from the Oxford Advanced Learner's Dictionary

by-

prefix
 
/baɪ/
 
/baɪ/
(also bye-)
in nouns
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  1. less important
    • a by-product
  2. near
    • a bystander
See by- in the Oxford Advanced American Dictionary
trait
noun
 
 
From the Word list
Oxford 5000
B2
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