/ Dictionary / Index F fo'c's'le: Meaning and Definition of Find definitions for: fo'c's'le Pronunciation: (fōk'sul), [key] — n. Naut. forecastle. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. focometer focus Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language