Definify.com
Definition 2025
Fm
fm
fm
Translingual
Symbol
fm
- (metrology) The symbol for femtometer or femtometre, a unit of length. The name fermi for this unit is obsolete.
 - abbreviation for Fathom
 
Swedish
Alternative forms
- fm.
 - f.m.
 - f. m.
 
Abbreviation
fm
- am (indicating hours in the morning); Abbreviation of förmiddagen.
 
Usage notes
- Since the 1960s, Sweden primarily uses the 24 hour clock, making am/pm abbreviations unnecessary and less common