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 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
The late stage, occurring approximately 2 billion years ago, further optimized the capacity to harvest far-red light by evolving a second modified photosystem incorporating chlorophyll f at critical locations.
From Science Daily ● Nov. 28, 2023
Now, me f I've got no use for lame excuses or imitation love that packs a punch.
From "Bronx Masquerade" by Nikki Grimes
The case stemmed from a broader legal dispute over the renaming of the cultural institution, which US law designates as a memorial to President John F Kennedy.
From BBC ● Aug. 13, 2026
Ford Motor F 0.45%increase; green up pointing triangle is chasing its biggest military contract since the Cold War.
From The Wall Street Journal ● Jul. 27, 2026
"The team is united and that feeling is getting even stronger now," said Japan coach Hajime Moriyasu, whose side finished second in Group F behind the Netherlands.
From Barron's ● Jun. 29, 2026
Sweden finished third in Group F, winning its first game by four goals and losing its second by the same margin.
From Los Angeles Times ● Jun. 28, 2026
“Hey, here’s something else. Did you know I made that F costume because I was thinking ‘F for Fort’?”
From "Chasing Vermeer" by Blue Balliett
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
It was there, between the two trees, that the village sometimes gathered to sing and talk around a big f ire.
From "A Long Walk to Water" by Linda Sue Park
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
The price of a complete mammoth is $30,000 f. o. b.
From Time Magazine Archive
This is the same study which had previously been printed in the Zts. f. vergleichende Litteraturgeschichte, 1899, N.F. xiii.
From The Grateful Dead The History of a Folk Story by Gordon Hall Gerould
When reporters confronted Health and Human Services Secretary Robert F. Kennedy Jr. with these facts, he responded that such criticisms were “invalid” and that the cyclosporiasis outbreak was “under control.”
From Los Angeles Times ● Aug. 13, 2026
Across the street is an 8.5-acre historic South L.A. oasis — Augustus F. Hawkins Nature Park.
From Los Angeles Times ● Aug. 11, 2026
Health and Human Services Secretary Robert F. Kennedy Jr. has been a frequent critic of the food industry, which he has blamed for sickening Americans with ultraprocessed foods and chemicals.
From The Wall Street Journal ● Aug. 11, 2026
He could salvage his reputation following his infamous vote for Robert F. Kennedy Jr. He could, in short, live a little bit.
From Slate ● Aug. 8, 2026
This cargo was consigned to a Whitby solicitor, Mr. S. F. Billington, of 7, The Crescent, who this morning went aboard and formally took possession of the goods consigned to him.
From "Dracula" by Bram Stoker
“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
In fact, studies show that 66% of students who earn all A's play organized sports compared to just 24% of students with mostly D's and F's.
From Salon ● Jan. 1, 2025
A date for Soldier F's trial will be decided early in the New Year.
From BBC ● Dec. 6, 2024
But students didn’t come for help, and they kept getting D’s and F’s.
From Seattle Times ● Aug. 30, 2023
Maybe she’d gotten too many F’s on her report card or something.
From "The Sea of Monsters" by Rick Riordan
Previously an A and B student, Bell started getting Fs at Alemany that spring, according to court filings.
From The Wall Street Journal ● Dec. 5, 2025
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
And so when the Commanders got four Fs and two Ds in six of the eight categories, Rivera wanted answers.
From Washington Times ● Mar. 14, 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
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
"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
I found the expected f’s for s’s and a few other things that didn’t turn up as often, but I got used to them very quickly.
From "Kindred" by Octavia Butler
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
The time resolution of the setup after dispersion correction is ≤150 fs.
From Nature ● Mar. 28, 2017
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.
