F has 16 different meanings across 6 categories:
a degree on the Fahrenheit scale of temperature
a nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite
Folio, paper and book size (10"-12.5" x 15"-20")
An academic grade, specifically —
A failing grade, with the next best grade being either a D or an E (some institutions issue Es instead of Fs).
Initialism of fuck.
Abbreviation of false.
The sixth letter of the English alphabet, called ef and written in the Latin script.
The ordinal number sixth, derived from this letter of the English alphabet, called ef and written in the Latin script.
The name of the fourth tone of the model scale, or scale of C. F sharp (F♯) is a tone intermediate between F and G.
The fourth note of the diatonic scale of C major, called fa in solfège.
Ford Motor Company
Alternative letter-case form of F
Abbreviation of various proper names.