f
abbreviation
firm.
f
2
American
F
3
American
[ef]
/ ɛf /
Or
f
noun
-
F's,
plural
-
Fs,
plural
-
f's,
plural
-
fs
plural
-
the sixth letter of the English alphabet, a consonant.
-
any spoken sound represented by the letter F or f, as in fat, differ, or huff.
-
something having the shape of an F .
-
a written or printed representation of the letter F or f.
-
a device, as a printer's type, for reproducing the letter F or f.
F
5
American
Symbol.
-
the sixth in order or in a series.
-
(sometimes lowercase) (in some grading systems) a grade or mark that indicates academic work of the lowest quality; failure.
-
Music.
-
the fourth tone in the scale of C major or the sixth tone in the relative minor scale, A minor.
-
a string, key, or pipe tuned to this tone.
-
a written or printed note representing this tone.
-
(in the fixed system of solmization) the fourth tone of the scale of C major, called fa.
-
the tonality having F as the tonic note.
-
-
(sometimes lowercase) the medieval Roman numeral for 40.
-
Mathematics.
-
(sometimes lowercase) farad.
-
Chemistry. fluorine.
-
(sometimes lowercase)
-
Biochemistry. phenylalanine.
f/
6
American
Or
f/
or
f:
abbreviation
Photography.
F-
7
American
abbreviation
Military.
f.
8
American
abbreviation
f.
9
American
abbreviation
f.
10
American
abbreviation
f.
11
American
abbreviation
f.
12
American
abbreviation
-
farad.
-
farthing.
-
father.
-
fathom.
-
feet.
-
female.
-
feminine.
-
filly.
-
fine.
-
fluid (ounce).
-
folio.
-
following.
-
foot.
-
form.
-
formed of.
-
franc.
-
from.
-
Mathematics. function (of ).
F.
13
American
abbreviation
-
Fahrenheit.
-
February.
-
Fellow.
-
forint.
-
franc; francs.
-
France.
-
French.
-
Friday.
F
1
British
symbol
-
music
-
a note having a frequency of 349.23 hertz ( F above middle C ) or this value multiplied or divided by any power of 2; the fourth note of the scale of C major
-
a key, string, or pipe producing this note
-
the major or minor key having this note as its tonic
-
-
Fahrenheit
-
Fellow
-
chem fluorine
-
Helmholtz function
-
physics force
-
franc(s)
-
farad(s)
-
genetics a generation of filial offspring, F 1 being the first generation of offspring, F 2 being the second generation, etc
abbreviation
f
2
British
symbol
-
music forte: an instruction to play loudly
-
physics frequency
-
(formerly in the Netherlands) guilder
-
maths function (of)
-
physics femto-
-
chess See algebraic notation
f.
3
British
abbreviation
-
fathom(s)
-
female
-
grammar feminine
-
folio
-
following (page)
f
4
British
/ ɛf /
noun
-
the sixth letter and fourth consonant of the modern English alphabet
-
a speech sound represented by this letter, usually a voiceless labio-dental fricative, as in fat
F-
5
British
abbreviation
f
6
British
symbol
Other Word Forms
Noun Inflected Forms
Etymology
Origin of f.8
From the Latin word fac
Origin of f.9
From the Latin word f īant
Origin of f.10
From the Latin word fiat
Origin of f.11
From the Dutch word florin
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
See Examples For:
The most recent game in the franchise, a spin-off called Silent Hill f, sold a million copies the day it was released in September 2025.
From BBC ● Feb. 16, 2026
The cybersecurity company’s earnings and revenue forecast met analysts’ expectations but f ailed to impress investors.
From Barron's ● Nov. 20, 2025
Thompson has instituted a curfew around the facility, allowing protests to occur only between f 9 a.m. and 6 p.m.
From Los Angeles Times ● Oct. 10, 2025
In Welsh a single f is pronounced as a v — it takes two fs to make the noise in “fight” — and the emphasis is always on the penultimate syllable.
From Salon ● May 27, 2024
But I held my tongue after this retort. f Would I always be so contentious?
From "Ophelia" by Lisa Klein
County Sheriff’s Deputy Justin Pyon said Thursday night that detectives had ended their search “on a large plot of land” near 50th Street East and Avenue F in Lancaster.
From Los Angeles Times ● Oct. 2, 2026
The BBC's Caitríona Perry spoke to Kerry Kennedy, the niece of late president John F Kennedy, about demolition threats to the performance centre named after him.
From BBC ● Sep. 19, 2026
One of Mackie's early assignments saw him sketch the dress that Marilyn Monroe wore when she delivered her breathy rendition of "Happy Birthday Mr President" to John F Kennedy in 1962.
From BBC ● Sep. 14, 2026
Encoded Therapeutics, a South San Francisco, Calif.-based developer of precision genetic medicines for severe neurological disorders, closed a $275 million Series F round from investors including GV and Venrock.
From The Wall Street Journal ● Sep. 10, 2026
“I know you’re in preseason training, but I'm going to talk to Coach about scheduling in some tutoring time. I'm not going to be the guy who gave you an F and made you ineligible.”
From "Tradition" by Brendan Kiely
The cybersecurity company’s earnings and revenue forecast met analysts’ expectations but f ailed to impress investors.
From Barron's ● Nov. 20, 2025
Thompson has instituted a curfew around the facility, allowing protests to occur only between f 9 a.m. and 6 p.m.
From Los Angeles Times ● Oct. 10, 2025
In Welsh a single f is pronounced as a v — it takes two fs to make the noise in “fight” — and the emphasis is always on the penultimate syllable.
From Salon ● May 27, 2024
A trial of the system f took place with two company employees in 2020 - the first successful passenger ride using hyperloop technology.
From BBC ● Dec. 22, 2023
“Let’s go and play table tennis. I belong to this small private club in Victoria Island,” he said, f “I haven’t played in ages.”
From "Americanah" by Chimamanda Ngozi Adichie
The Cincinnati Bengals ranked 27th and had an F- grade for their nutritional offerings.
From Washington Post ● Mar. 1, 2023
"If I could go lower than F- I would," John, a Floridian visiting the Golden State, told Fox News.
From Fox News ● Aug. 21, 2021
Freekick just outside the D. And the resultant freekick is an F-, as Oscar dabs the ball into the wall.
From The Guardian ● Sep. 16, 2015
Simply by changing the Ph- to an F-, the country star showed just how easily team names could be switched from masculine to feminine.
From Salon ● Mar. 29, 2014
The time in the F- 86, everything had gone well.
From "Flying to the Moon: An Astronaut's Story" by Michael Collins
“Syzygy or, the Ceasing of the Sun” by juliany f. taveras is a rumination on what the future might be like.
From New York Times ● Sep. 23, 2021
Adults of C. f. pastinator resemble the juvenile condition typical of C. f. frugilegus.
From Scientific American ● May 12, 2013
In 1924 he profited $25,000,000 by shipping parts to district assembling plants, putting them together there and then charging the f. o. b. selling price.
From Time Magazine Archive
Transportation costs, added to the f. o. b. price. also influence the second-hand market.
From Time Magazine Archive
The dielectric should vary enormously in resistance by minute variations of the e. m. f. across the discharge space.
From The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting by Thomas Commerford Martin
The Port Authority of New York and New Jersey confirmed that officers responded to Delta Flight 938 after it arrived at John F. Kennedy International Airport around 11 p.m.
From Salon ● Oct. 12, 2026
Haldeman and John Ehrlichman at Camp David in 1973, while 12 years earlier John F. Kennedy received counsel there from Eisenhower after the Bay of Pigs disaster.
From Salon ● Oct. 10, 2026
The work was led by joint first authors Hanna-Maria Häkkinen, Marta Batet Palau and Laura F. Bianchi and supervised by Verena Ruprecht.
From Science Daily ● Oct. 5, 2026
Congress in 2019 enacted amendments reiterating that the center’s mission is to serve as a center for the performing arts and as a “national memorial to President John F. Kennedy.”
From The Wall Street Journal ● Sep. 22, 2026
President John F. Kennedy sat at his desk in the Oval Office, a heavy weight on his mind.
From "Boots on the Ground: America's War in Vietnam" by Elizabeth Partridge
In general, we have a school district focused on 100% graduation rates, no F’s.
From Los Angeles Times ● Jul. 1, 2026
“We have seen Louisiana students go from all F’s to straight A’s because of this program,” Landry said in a written statement to the Journal.
From The Wall Street Journal ● Apr. 23, 2026
Neither Pool D or Pool F's winners can meet holders and top-ranked South Africa until the final, presuming the Springboks top their own group.
From BBC ● Dec. 3, 2025
To make tracking your diet easier, consider using a food calculator to measure how well your meals align with the four F's and microbiome friendly options.
From Salon ● Oct. 29, 2024
F’s at school because I was absent and absent and absent again.
From "The Tenth Mistake of Hank Hooperman" by Gennifer Choldenko
Mr. Brownlee’s tenor proved rock-solid in Arturo’s demanding music, from his exquisitely relaxed, almost languid opening aria, “A te, o cara,” to some punishing high Fs.
From The Wall Street Journal ● Jan. 2, 2026
This exercise is the opposite of a zero Fs situation, though – she very much cares about the final glimpse the public has of Wendy Williams.
From Salon ● Feb. 23, 2024
"It's helped me progress my education a lot because in my old school, I was predicted Fs and stuff - now I'm predicted Cs and Bs."
From BBC ● Aug. 10, 2023
The complaint says Fallen Footwear has used the back-to-back Fs for a logo since 2003.
From Washington Times ● Jun. 13, 2023
Chris left Reed before the final set of exams, leaving him with a row of Fs on his transcript.
From "Outliers" by Malcolm Gladwell
The Georgia native painted himself so much as one of Philly’s own, that it’s amazing Collins didn’t confess he was named with two f’s in honor of the Temple Tuff motto.
From Washington Times ● Dec. 14, 2016
Royal looked up and said, ‘I’ve been sitting here for 30 minutes, trying to figure out if professor has one or two f’s in it.’
From New York Times ● Nov. 7, 2012
"The only name I like is Jeff if you spell it with two f's instead of t's," she said.
From Time Magazine Archive
Gibbous nose aloft and in fine priggish voice, Master Freddie imparts phonetic reality to an age when Britishers wrote s's that looked like f's.
From Time Magazine Archive
Only Momma could decipher the lacy handwriting with its long, tall letters all bunched together and the lines running into one another because of the long-tailed, fancy z’s and f’s and g’s.
From "Homecoming" by Cynthia Voigt
To follow the transformation, the researchers used time-resolved reflectance spectroscopy and ultrashort laser pulses lasting only six fs.
From Science Daily ● Aug. 21, 2026
In Welsh a single f is pronounced as a v — it takes two fs to make the noise in “fight” — and the emphasis is always on the penultimate syllable.
From Salon ● May 27, 2024
Emotional truth is sacrificed at the altar of manufactured laffs, with two fs.
From Los Angeles Times ● Mar. 17, 2022
Suppose a jet airplane is coming nearly straight at you, emitting a sound of frequency fs .
From Textbooks ● Aug. 12, 2015
Their prices are the following if they are perfect in colour and purity:— One which weighs a carat, which is half a fanam, is worth in Calicut thirty fanoes xxx fs.
From A Description of the Coasts of East Africa and Malabar in the Beginning of the Sixteenth Century by Duarte Barbosa
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
