Princeton's WordNet

1. degree Fahrenheit, F(noun)

   a degree on the Fahrenheit scale of temperature

2. fluorine, F, atomic number 9(noun)

   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

3. farad, 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

4. F, f(noun)

   the 6th letter of the Roman alphabet

Kernerman English Learner's Dictionary

1. F(noun)ˈɛf

   a grade showing a student has failed

   I got an F on the test.

2. F(abbreviation)ˈɛf

   Fahrenheit

   80; º F

3. Fˈɛf

   false

   Put a T or F next to each statement.

4. Fˈɛf

   female

   ***Put a check next to M or F.

Wiktionary

1. f(Symbol)

   Folio, paper and book size (10"-12.5" x 15"-20")

2. f(Symbol)

   The name of the fourth tone of the model scale, or scale of C. F sharp (Fu266F) is a tone intermediate between F and G.

3. f(Symbol)

   fuck

   What the f do you think you're doing ?

4. F(Noun)

   A failing grade in a class or course. The next best grade is a D. Some institutions issue Es instead of Fs.

5. F(Noun)

   American Library Association for folio-sized books, over 30 cm in height.

6. F(Noun)

   An academic grade given by certain institutions. Slightly better than an F and slightly worse than a D-.

Webster Dictionary

1. F(u)

   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. F(verb)

   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 Standard Electrical Dictionary

1. F

   Abbreviation for Fahrenheit, as 10º F., meaning 10º Fahrenheit. (See Fahrenheit Scale.)

• FahrenheitAfrikaans
• فِهرِنهايتArabic
• фаренхайтBulgarian
• FPortuguese (BR)
• FahrenheitCzech
• FahrenheitGerman
• FDanish
• Φαρενάιτ (συντομογρ.)Greek
• FahrenheitSpanish
• F (Fahrenheiti tähis)Estonian
• فارنهایتFarsi
• FFinnish
• FahrenheitFrench
• פָרֶנהַיטHebrew
• फैरेनहिट का संक्षिप्तHindi
• kratica za farenhajtCroatian
• FahrenheitHungarian
• FIndonesian
• FahrenheitItalian
• 華氏Japanese
• 화씨 온도계Korean
• pagal FarenheitąLithuanian
• FārenheitsLatvian
• FMalay
• F., FahrenheitDutch
• F (fahrenheit)Norwegian
• F, FahrenheitPolish
• فارنهایتPersian
• فارنهایتPashto
• FahrenheitRomanian
• шкала ФаренгейтаRussian
• FahrenheitSlovak
• FahrenheitSlovenian
• FarenhajtSerbian
• FahrenheitSwedish
• ฟาห์เรนไฮต์Thai
• Fahrenheit derecesiTurkish
• 華氏溫度(書面縮寫)Chinese (Trad.)
• температурна шкала ФаренгейтаUkrainian
• کی تخفیف FahrenheitUrdu
• độ Fa-ren-hétVietnamese
• 华氏温度（书面语缩写式）Chinese (Simp.)