F (Noun) — The 6th letter of the Roman alphabet.
F (Noun) — A degree on the Fahrenheit scale of temperature.
F (Noun) — The capacitance of a capacitor that has an equal and opposite charge of 1 coulomb on each plate and a voltage difference of 1 volt between the plates.
F (Noun) — A nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite, cryolite or fluorapatite.