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
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
All right f Apollo sobbed over his ukulele.
From "Blood of Olympus" by Rick Riordan
Ford Motor F -0.39%decrease; red down pointing triangle is recalling more than 740,000 vehicles due to a transmission and parking system issue, federal regulators said.
From The Wall Street Journal ● Jun. 30, 2026
The Foundation for Individual Rights and Expression, a nonpartisan, free-speech advocacy group, gave the university an F in its free-speech ranking this year, placing it 217th out of 252 schools.
From The Wall Street Journal ● Jun. 29, 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
“Mr. Clifton,” I told him, very seriously, “you should probably take that down. Because otherwise someone might find out that you got an F in math.”
From Absolutely Almost by Lisa Graff
Some of the most intriguing targets include the TRAPPIST-1 system planets d, e, f, and g, located about 40 light-years from Earth, as well as LHS 1140 b, which lies 48 light-years away.
From Science Daily ● Mar. 25, 2026
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
But I held my tongue after this retort. f Would I always be so contentious?
From "Ophelia" by Lisa Klein
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
The price of a complete mammoth is $30,000 f. o. b.
From Time Magazine Archive
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
Generally it was necessary to transform upward, when the e. m. f. was very low, and usually an ordinary form of induction coil was employed, but sometimes the arrangement illustrated in Fig.
From The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting by Martin, Thomas Commerford
If John F. Kennedy gets to speak for two minutes, then Richard Nixon gets to speak for two minutes.
From Salon ● Jul. 10, 2026
F. Scott Fitzgerald, Octavia E. Butler, Homer: Los Angeles teachers share what they are teaching in today’s high school classrooms, book recommendations and how they’re fighting AI and tech fatigue.
From Los Angeles Times ● Jul. 2, 2026
A pilot of JetBlue Airways Flight 948 reported hitting a drone during a Monday morning landing at New York’s John F. Kennedy International Airport.
From The Wall Street Journal ● Jun. 29, 2026
Stewart has worked on a number of famous cases, including the Unabomber and the reinvestigations of the murders of Martin Luther King Jr. and President John F. Kennedy.
From The Wall Street Journal ● Jun. 29, 2026
Stephen F. Austin leads the first Americans to Texas in 1825.
From "In the Shadow of Liberty" by Kenneth C. Davis
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
They created a framework they call the four F's to help you name your highest values.
From Salon ● May 24, 2025
What was it like being Liga F's top scorer and assist maker last season?
From BBC ● Oct. 15, 2024
“I thought I should tell you about it before I get two F’s on my report card.”
From "A Mango-Shaped Space" by Wendy Mass
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
When results day came around, Luke got his results - four Fs and an E.
From BBC ● Aug. 17, 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
“What if people think that the three Fs stand for ‘fee-fi-fo’?”
From "Sir Fig Newton and the Science of Persistence" by Sonja Thomas
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
It indicates the plurals of letters: How many f’s are there in Fulham?
From "Eats, Shoots & Leaves" by Author
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
Adding a saturated -CH2-CH2- spacer between the chromophore and the carboxylate anchoring group extended the injection time to 57 fs, confirming the strong distance dependence of the electron transfer rate.
From Nature ● Aug. 15, 2012
And when they have this perfection they are worth the following prices:— If the turquoise is of the said perfection and weighs a carat, it will be worth in the Malabar country xv fs.
From A Description of the Coasts of East Africa and Malabar in the Beginning of the Sixteenth Century by Barbosa, Duarte
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.
