nounplural noun Fs, plural noun F's
1The sixth letter of the alphabet.
- 1.1Denoting the next after E in a set of items, categories, etc.
- 1.2The sixth highest or lowest class of academic marks (also used to represent “Fail”)‘they are guaranteed F's if they goof around’
- ‘Moreover, not only Fs but also Ds are frowned on, and grades are regularly inflated to achieve C averages.’
- ‘In the schools I went to, when you get that many Fs, you flunk out.’
- 1.3fChess Denoting the sixth file from the left, as viewed from White's side of the board.‘Black has no way to oppose the Rooks on the f-file.’
- ‘I don't like black's vulnerable f file or e5 pawn however.’
2usually FMusic
The fourth note of the diatonic scale of C major.- 2.1A key based on a scale with F as its keynote.
- ‘The key of F is found most commonly in folk-oriented music.’
- 2.1A key based on a scale with F as its keynote.
Pronunciation
abbreviation
1Fahrenheit.
- ‘60°F’
2Farad(s).
3FChemistry
Faraday(s).4(in racing results) favorite.
- ‘2nd Miss Prism 2–1 F’
5Female.
6Fighter (in designations of US aircraft types)
- ‘the F117 Stealth fighter’
7(in auto racing) formula.
- ‘an F1 driver’
8Franc(s)
- ‘$1.00 = F5.9645 as at April 29’
9Failure.
10False.
11February.
12Fellow.
13Forint.
14France.
15French.
Pronunciation
1The chemical element fluorine.
2Physics
Force.- ‘F = ma’
Pronunciation
abbreviation
1Farad.
2Farthing.
3Father.
4Fathom.
5Feet.
6Grammar
Feminine.7Female.
8in combination (in units of measurement) femto- (10¹⁵).
9Filly.
10Fine.
11(in textual references) folio.
12Foot.
13Form.
14Music
Forte.15(in racing results) furlong(s).
16Franc.
17From.
18Chemistry
Denoting electrons and orbitals possessing three units of angular momentum.- ‘f-orbitals’
Origin
Ffrom fundamental, originally applied to lines in atomic spectra.
Pronunciation
2Mathematics
A function of a specified variable.- ‘the value of f(x)’
3Electronics
Frequency.