ELM

Elm could mean:

Elms, trees of the Genus Ulmus
Elm (e-mail client)
Elm (range), a hill range in Germany
Elm, Cambridgeshire, a village in Cambridgeshire, United Kingdom
Elm, Switzerland, a village in the Canton of Glarus
Elmira-Corning Regional Airport near Elmira, NY and Corning, NY

To people:
 Professor Elm, fictional character from Pokémon
 Steven Elm, Canadian speed skater