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ONAD→ump

ump

Flag: gbEnglishOxford New American Dictionary
ump /əmp, əmp / US informal
▸ noun an umpire:
the ump ruled Brett out
she doesn't see anything wrong with the ump's call.
▸ verb [no object] act as an umpire:
he umped in the minors.
– ORIGIN early 20th century : abbreviation.