- F
- Ff [ef] n plural F's f's1.) [U and C]the sixth letter of the English alphabet2.) [U and C]3.)a mark given to a student's work to show that it is not good enough▪ I got an F in chemistry.→↑f-wordF 21.) the written abbreviation of Fahrenheit▪ Water boils at 212º F.2.) the written abbreviation of female3.) the written abbreviation of false
Dictionary of contemporary English. 2013.