GamesDaily CrosswordWord PuzzleWord FinderAll gamesFeaturedWord of the DayWord of the YearNew wordsLanguage storiesAll featuredCultureSlangEmojiMemesAcronymsGender and sexualityAll cultureWriting tipsWriting hubGrammar essentialsCommonly confusedAll writing tipsGamesFeaturedCultureWriting tipsAdvertisementSkip toSkip tof1abbreviation (3)F2noun (5)f.3abbreviation (1)f4Definitions (2)F5abbreviation (5)f.6abbreviation (1)F7Definitions (10)f.8abbreviation (1)f.9abbreviation (1)f.10abbreviation (18)f/11abbreviation (1)F-12abbreviation (1)F.13abbreviation (8)AdvertisementAmericanBritishf1abbreviation.Photography. .Music. .F2Or f[ef]Phonetic (Standard)IPAnounplural F's, Fs, f's, fs. 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.3abbreviation(in prescriptions) make.f4Symbol.Optics. .Mathematics. function (of). See .F5abbreviation.Genetics. .firm.; francs..f.6abbreviation(in prescriptions) let them be made.F7Symbol.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. .function (of). See .(sometimes lowercase) .Chemistry. .(sometimes lowercase) ...Biochemistry. .f.8abbreviation(in prescriptions) let it be made; let there be made.f.9abbreviation(in the Netherlands) guilder; guilders.f.10abbreviationfarad.farthing.father.fathom.feet.female.feminine.filly.fine.fluid (ounce).folio.following.foot.form.formed of.franc.from.Mathematics. function (of ).f/11Or f/Or f:abbreviationPhotography..F-12abbreviationMilitary.(in designations of aircraft) fighter.F-105.F.13abbreviationFahrenheit.February.Fellow.forint.franc; francs.France.French.Friday.F1symbolmusica 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 majora key, string, or pipe producing this notethe major or minor key having this note as its tonicFahrenheitFellowchem fluorineHelmholtz functionphysics forcefranc(s)farad(s)genetics a generation of filial offspring, F 1 being the first generation of offspring, F 2 being the second generation, etc“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012abbreviationFrance (international car registration)“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012f2symbolmusic forte: an instruction to play loudlyphysics frequency(formerly in the Netherlands) guildermaths function (of)physics femto-chess See “Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012f.3abbreviationfathom(s)femalegrammar femininefoliofollowing (page)“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012f4/ ɛf /nounthe sixth letter and fourth consonant of the modern English alphabeta speech sound represented by this letter, usually a voiceless labio-dental fricative, as in fat“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012F-5abbreviationfighterF-106“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012f6symbolf-number“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012Discover MoreWord History and OriginsOrigin of f1From the Latin word facOrigin of f2From the Latin word f īantOrigin of f3From the Latin word fiatOrigin of f4From the Dutch word florinDiscover MoreWord History and OriginsOrigin of f1(sense 3) from Dutch: florinAdvertisementAdvertisementAdvertisementAdvertisementBrowse#aabbccddeeffgghhiijjkkllmmnnooppqqrrssttuuvvwwxxyyzzContact usDo not sell my infoFollow usGet the Word of the Day every day!Sign upBy clicking "Sign Up", you are accepting Dictionary.com © 2025 Dictionary.com, LLC, Log into Facebook to start sharing and connecting with your friends, family, and people you know., Log into Facebook to start sharing and connecting with your friends, family, and people you know..