1. F is the sixth letter of the English alphabet, and a nonvocal consonant. Its form and sound are from the Latin. The Latin borrowed the form from the Greek digamma /, which probably had the value of English w consonant. The form and value of Greek letter came from the Phoenician, the ultimate source being probably Egyptian. Etymologically f is most closely related to p, k, v, and b; as in E. five, Gr. pe`nte; E. wolf, L. lupus, Gr. ly`kos; E. fox, vixen ; fragile, break; fruit, brook, v. t.; E. bear, L. ferre. See Guide to Pronunciation, // 178, 179, 188, 198, 230.
2. (v. t.) 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.
3. (n.) the 6th letter of the Roman alphabet
4. (n.) 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
5. (n.) a degree on the Fahrenheit scale of temperature
6. (n.) 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