The ordinal number sixth, derived from this letter of the English alphabet, called ef and written in the Latin script.

The fourth note of the diatonic scale of C major, called fa in solfège. / The scale or key which has that note for its tonic.

(stock ticker symbol) Ford Motor Company

Abbreviation of false. / Abbreviation of female. / (philately) Abbreviation of fine.

A failing grade, with the next best grade being either a D or an E (some institutions issue Es instead of Fs). / (UK) A grade lower than E but higher than G.

Abbreviation of various proper names. / Abbreviation of Fahrenheit. / Abbreviation of Father, as a title given to priests. / Abbreviation of French. / Abbreviation of Friday.

(euphemistic) Initialism of fuck.

(Internet slang, Twitch) Used to indicate regret for an unfortunate event.

(grammar) Abbreviation of feminine.

(grammar) Abbreviation of feminine. / (biology) Abbreviation of form. Used in certain three-part names / (postpositive) and the following (page, paragraph, etc.)