F definition | Dictionary.com

F, f

[ef]

–noun, plural F's or Fs, f's or fs.

1.	the sixth letter of the English alphabet, a consonant.

2.	any spoken sound represented by the letter F or f, as in fat, differ, or huff.

3.	something having the shape of an F.

4.	a written or printed representation of the letter F or f.

5.	a device, as a printer's type, for reproducing the letter F or f.

F

1.	Fahrenheit.

female.

3.	Genetics. filial.

firm.

5.	franc; francs.

French.

F

Symbol.

1.	the sixth in order or in a series.

2.	(sometimes lowercase) (in some grading systems) a grade or mark that indicates academic work of the lowest quality; failure.

Music.

a.	the fourth tone in the scale of C major or the sixth tone in the relative minor scale, A minor.

b.	a string, key, or pipe tuned to this tone.

c.	a written or printed note representing this tone.

d.	(in the fixed system of solmization) the fourth tone of the scale of C major, called fa.

e.	the tonality having F as the tonic note.

4.	(sometimes lowercase) the medieval Roman numeral for 40. Compare Roman numerals.

Mathematics.

field.

b.	function (of).

6.	(sometimes lowercase) Electricity. farad.

7.	Chemistry. fluorine.

(sometimes lowercase

) Physics.

force.

b.	frequency.

fermi.

9.	Biochemistry. phenylalanine.

f

firm.

2.	Photography. f-number.

3.	Music. forte.

f

Symbol, Optics. focal length.

F-

Military.

(in designations of aircraft) fighter: F-105.

F.

1.	Fahrenheit.

February.

Fellow.

forint.

5.	franc; francs.

France.

French.

Friday.

f.

1.	(in prescriptions) make. Origin: < L fac

farad.

farthing.

father.

fathom.

feet.

female.

feminine.

9.	(in prescriptions) let them be made. Origin: < L fīant

10.	(in prescriptions) fiat.

11.

filly.

12.

fine.

13.	fluid (ounce).

14.

folio.

15.	following.

16.

foot.

17.

form.

18.	formed of.

19.

franc.

20.

from.

21.	Mathematics. function (of).

22.	(in the Netherlands) guilder; guilders.

f/

Photography.

f-number.

Also, f/, f:

Wein⋅gart⋅ner

[vahyn-gahrt-nuh

–noun

(Paul) Fe⋅lix (Ed⋅ler von Münz⋅berg) [poul fey-liks eyd-luh

r fuh

n mynts-berk]

, 1863–1942, Austrian composer, conductor, and writer.

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Link To F

f¹ or F (ěf)

n. pl. f's or F's also fs or Fs

The sixth letter of the modern English alphabet.
Any of the speech sounds represented by the letter f.
The sixth in a series.
Something shaped like the letter F.
F A grade that indicates failing status.
Music
1. The fourth tone in the scale of C major or the sixth tone in the relative minor scale.
2. A key or scale in which F is the tonic.
3. A written or printed note representing this tone.
4. A string, key, or pipe tuned to the pitch of this tone.

f²
abbr.

Grammar feminine
focal length
forte
function

F¹
The symbol for the element fluorine.

F²
abbr.

Fahrenheit
fail
farad
female
Genetics filial generation
foul
franc
Friday

Fahr·en·heit (fār'ən-hīt')

adj. Abbr. F
Of or relating to a temperature scale that registers the freezing point of water as 32° and the boiling point as 212° at one atmosphere of pressure. See Table at measurement.

[After Gabriel Daniel Fahrenheit.]

far·ad (fār'əd, -ād')

n. Abbr. F
The unit of capacitance in the meter-kilogram-second system equal to the capacitance of a capacitor having an equal and opposite charge of 1 coulomb on each plate and a potential difference of 1 volt between the plates. See Table at measurement.

[After Michael Faraday.]

fluor·ine (flŏŏr'ēn', -ĭn, flôr'-, flōr'-)

n. Symbol F
A pale-yellow, highly corrosive, poisonous, gaseous halogen element, the most electronegative and most reactive of all the elements, used in a wide variety of industrially important compounds. Atomic number 9; atomic weight 18.9984; freezing point -219.62°C; melting point -223°C; boiling point -188.14°C; specific gravity of liquid 1.108 (at boiling point); valence 1. See Table at element.

focal length
n. Abbr. f
The distance from the surface of a lens or mirror to its focal point. Also called focal distance, focus.

for·te² (fôr'tā')

adv. & adj. Abbr. f
In a loud, forceful manner. Used chiefly as a direction.
n. A note, passage, or chord played forte.

[Italian, strong, forte, from Latin fortis; see bhergh-² in Indo-European roots.]

foul (foul)

adj. foul·er, foul·est

Offensive to the senses; revolting.
Having an offensive odor; smelly.
Rotten or putrid: foul meat.
1. Full of dirt or mud; dirty. See Synonyms at dirty.
2. Full of impurities; polluted: foul air.
3. Sports Contrary to the rules of a game or sport: a foul boxing punch.
4. Baseball Outside the foul lines: a foul fly ball.
Morally detestable; wicked: foul deeds.
Of a vulgar or obscene nature: foul language.
Very disagreeable or displeasing; horrid: a foul movie.
Bad or unfavorable: in fair weather or foul.
Violating accepted standards or rules; dishonorable: used foul means to gain power.
1. Sports Contrary to the rules of a game or sport: a foul boxing punch.
2. Baseball Outside the foul lines: a foul fly ball.
Entangled or twisted: a foul anchor.
Clogged or obstructed; blocked: a foul ventilator shaft.
Archaic Ugly; unattractive.

Abbr. F
1. Sports An infraction or a violation of the rules of play.
2. Baseball A foul ball.
An entanglement or a collision.
An instance of clogging or obstructing.

adv.  In a foul manner.
v.   fouled, foul·ing, fouls

v.   tr.

To make dirty or foul; pollute. See Synonyms at contaminate.
To bring into dishonor; besmirch.
To clog or obstruct.
To entangle or catch (a rope, for example).
Nautical To encrust (a ship's hull) with foreign matter, such as barnacles.
1. Sports To commit a foul against.
2. Baseball To hit (a ball) outside the foul lines.

v. intr.

To become foul.
1. Sports To commit a foul.
2. Baseball To hit a ball outside the foul lines: fouled twice and then struck out; fouled out to the catcher.
To become entangled or twisted: The anchor line fouled on a rock.
To become clogged or obstructed.

Phrasal Verb(s):
foul outSports To be put out of a game for exceeding the number of permissible fouls.
foul upTo blunder or cause to blunder because of mistakes or poor judgment.

[Middle English, from Old English fūl; see p- in Indo-European roots.]
foul'ly adv., foul'ness n.

franc (frāngk)

n. Abbr. F or fr.

See Table at currency.
The primary unit of currency in Belgium, France, Luxembourg, and Monaco before the adoption of the euro.

[Middle English frank, French gold coin, from Old French franc, from Medieval Latin Francōrum (rēx), (king) of the Franks (from the legend on the first of these coins), genitive pl. of Francus, Frank; see Frank.]

Fri·day (frī'dē, -dā')

n. Abbr. Fri. or Fr. or F
The sixth day of the week.

[Middle English Fridai, from Old English Frīgedæg; see prī- in Indo-European roots.]
Fri'days adv.

func·tion (fŭngk'shən)

The action for which a person or thing is particularly fitted or employed.
1. Assigned duty or activity.
2. A specific occupation or role: in my function as chief editor.
3. A variable so related to another that for each value assumed by one there is a value determined for the other.
4. A rule of correspondence between two sets such that there is a unique element in the second set assigned to each element in the first set.
An official ceremony or a formal social occasion.
Something closely related to another thing and dependent on it for its existence, value, or significance: Growth is a function of nutrition.
Abbr. f Mathematics
1. A variable so related to another that for each value assumed by one there is a value determined for the other.
2. A rule of correspondence between two sets such that there is a unique element in the second set assigned to each element in the first set.
Biology The physiological activity of an organ or body part.
Chemistry The characteristic behavior of a chemical compound, resulting from the presence of a specific functional group.
Computer Science A procedure within an application.

intr.v. func·tioned, func·tion·ing, func·tions
To have or perform a function; serve: functioned as ambassador.

[Latin fūnctiō, fūnctiōn-, performance, execution, from fūnctus, past participle of fungī, to perform, execute.]
func'tion·less adj.

Synonyms: These nouns denote the actions and activities assigned to, required of, or expected of a person: the function of a teacher; a bank clerk's duty; assumed the office of financial adviser; the role of a parent.

F\ ([e^]f). 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 Ph[oe]nician, 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, [sect][sect] 178, 179, 188, 198, 230.

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

F clef, the bass clef. See under Clef.

Language Translation for : F

Spanish: Fahrenheit,

German: Fahrenheit,

Japanese: 華氏

More Translations »

F

A Nasdaq stock symbol specifying that the stock is a foreign company.

Investopedia Commentary

Nasdaq-listed securities have four or five characters. If a fifth letter appears, it identifies the issue as other than a single issue of common stock or capital stock.