(rare, usually no longer productive, primarily in dialects, chiefly Scotland) Prefix meaning around, about.

Initialism of University of Miami. / Initialism of University of Michigan.

(philately) Initialism of unmounted mint.

plural of um

Third-person singular simple present indicative form of um

Alternative form of 'em

simple past tense and past participle of um

present participle of um

Initialism of United Mexican States.

plural of UM