Definition of "fm" []

• The symbol for femtometer or femtometre, a unit of length. The name fermi for this unit is obsolete. (noun)
• Abbreviation for Fathom (noun)

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• "The latter seems like a move to appease the record labels, but taken together, it looks like Last. fm is trying to develop a post-advertising business model."
• "QuickTime trailers are lined up on a virtual shelf, while Last. fm is presented as a simple widget to type your favourite artists into."
• "Ping. fm is a site that aims to make the dissemination of information easier."