/ Dictionary / Index F F.Mk.: Meaning and Definition of Find definitions for: F.Mk. Pronunciation: [key] finmark; Finnish markka. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. FM cyclotron fn Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language