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Definition of -er suffix from the Oxford Advanced Learner's Dictionary

-er

suffix
 
/ə(r)/
 
/ər/
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  1. (in nouns) a person or thing that performs the action
    • lover
    • computer
    compare -ee, -or
  2. (in nouns) a person or thing that has the thing or quality mentioned
    • three-wheeler
    • foreigner
  3. (in nouns) a person studying or expert in
    • astronomer
    • philosopher
  4. (in nouns) a person belonging to
    • New Yorker
  5. (makes comparative adjectives and adverbs)
    • wider
    • bigger
    • happier
    • sooner
    compare -est
See -er in the Oxford Advanced American Dictionary
previously
adverb
 
 
From the Word list
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B1
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