fm

1 of 4

abbreviation (1)

fathom

Fm

2 of 4

symbol

fermium

FM

3 of 4

noun

ˈef-ˌem 

often attributive

: a broadcasting system using frequency modulation

also : a radio receiver of such a system

FM

4 of 4

abbreviation (2)

field manual

Examples of fm in a Sentence

Recent Examples on the Web

Noun

But back in the 1960s, before iPhones and Walkmans, the only way to actually listen to something on a plane was on a little portable FM radio, and there was a real concern with those radios interfering with airplane communication systems. — Popular Science Team, Popular Science, 22 July 2026

In the meantime, how’s that all-sports format doing on KNX-FM? — Richard Wagoner, Daily News, 20 July 2026

Waddingham teased the new season in a May 2025 interview on Capital FM. — Randall Colburn, Entertainment Weekly, 20 July 2026

The driver, 31-year-old Charles Medina, had passed two bicyclists — Rapp and her boyfriend — while traveling along FM 159 at a high rate of speed, per the probable cause statement. — Mirna Alsharif, NBC news, 19 July 2026

Word History

Etymology

Noun

frequency modulation

First Known Use

Noun

1940, in the meaning defined above

Kids Definition

FM

noun

ˈef-ˌem

: a system of broadcasting using frequency modulation

also : a receiver of radio waves broadcast by such a system

FM adjective

Medical Definition

Fm

symbol

fermium