| UM | a plant of the genus Mirabilis |
|---|---|
| UM | a mountainous region in central Italy |
| UM | an extinct Italic language of ancient southern Italy |
| UM | croakers |
| UM | fish of North American Pacific coast |
| UM | a Bantu language spoken in Angola |
| UM | a diacritical mark (two dots) placed over a vowel in German to indicate a change in sound |
| UM | an official at a baseball game |
| UM | the act of umpiring |
| UM | mediation by an umpire |
| UM | an official at a baseball game |
| UM | be a referee or umpire |