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Definition of umpire noun from the Oxford Advanced Learner's Dictionary

umpire

noun
 
/ˈʌmpaɪə(r)/
 
/ˈʌmpaɪər/
(also North American English, informal ump
 
/ʌmp/
 
/ʌmp/
)
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  1. (in sports such as tennis and baseball ) a person whose job is to watch a game and make sure that rules are not broken
    • The umpire’s decision is final.
    compare refereeTopics Sports: ball and racket sportsc1
    Oxford Collocations DictionaryUmpire is used after these nouns:
    • baseball
    See full entry
    Word Originlate Middle English (originally as noumpere) (denoting an arbitrator): from Old French nonper ‘not equal’. The n was lost by wrong division of a noumpere; compare with adder.
See umpire in the Oxford Advanced American Dictionary

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