f Syllabification: (f)Translate f | into French | into German | into Italian | into Spanish Definition of f abbreviation farad. farthing. father. fathom. feet. Grammar feminine. female. [in combination] (in units of measurement) femto- (1015). filly. fine. (in textual references) folio. following. foot. form. Music forte. (in racing results) furlong(s). franc. from. Chemistry denoting electrons and orbitals possessing three units of angular momentum:f-orbitals[f from fundamental, originally applied to lines in atomic spectra] symbol focal length:apertures of f/5.6 to f/11See also f-number. Mathematics a function of a specified variable:the value of f(x) Electronics frequency. f in other Oxford dictionaries Definition of f in the British & World English dictionary