Initialism of uridine monophosphate.

(sports, informal) An umpire.

(transitive, intransitive) To act as an umpire (in).

simple past tense and past participle of ump

plural of ump

Third-person singular simple present indicative form of ump

present participle of ump

(informal) Synonym of umpteen

(tennis, badminton) The official who presides over a tennis match sat on a high chair. / (cricket) One of the two white-coated officials who preside over a cricket match.

(sports, intransitive) To act as an umpire in a game. / (transitive) To decide as an umpire.