Symbol, Physics.
  1. femtometer.

Other definitions for Fm (2 of 5)


Symbol, Chemistry.
  1. fermium.

Other definitions for FM (3 of 5)


  1. Electronics. frequency modulation: a method of impressing a signal on a radio carrier wave by varying the frequency of the carrier wave.

  2. Radio. a system of radio broadcasting by means of frequency modulation.

  1. of, relating to, or utilizing such a system.

  • Compare AM.

Other definitions for fm. (4 of 5)


  1. fathom.

  2. from.

Other definitions for f.m. (5 of 5)


  1. (in prescriptions) make a mixture.

Origin of f.m.

From Latin fīat mistūra Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use fm in a sentence

  • Your immediate presence indispensable; no arrangement possible; F. M. has left the Castle.

    Major Frank | A. L. G. Bosboom-Toussaint
  • I am indebted to Mr. F. M. Wyndham for a knowledge of it: he found it frequently in use in Norway.

    The Art of Travel | Francis Galton
  • An outstanding feature of the campaign was the automobile tours, the plan of Mrs. F. M. Hall, chairman of Lancaster county.

  • In visiting many places I find them (the F. M.'s) nearly, if not quite, extinct.

    Birth of a Reformation | Andrew Byers
  • And so, too, our friend F. M.—with an elixir of too potent life.

    William Sharp (Fiona Macleod) | Elizabeth A. Sharp

British Dictionary definitions for fm (1 of 3)


abbreviation for
  1. fathom

  2. from

the internet domain name for
  1. Micronesia

British Dictionary definitions for Fm (2 of 3)


the chemical symbol for
  1. fermium

British Dictionary definitions for FM (3 of 3)


abbreviation for
  1. frequency modulation

  2. Field Marshal

  1. aeronautics figure of merit

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for Fm (1 of 2)


Scientific definitions for FM (2 of 2)


  1. Abbreviation of frequency modulation

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.