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English definition of “-er”


suffix (SPECIALIST)    /r/ US  //
added to the names of particular subjects to form nouns that refer to people who have knowledge about or are studying that subject : a philosopher (= a person who knows about/ studies philosophy ) an astronomer (= a person who knows about/ studies astronomy )Experts and specialists
(Definition of -er suffix (SPECIALIST) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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