noun , abbreviation
■ noun (also f ) / ef; NAmE / [ C , U ] ( pl. Fs , F's , f's / efs; NAmE /)
1.
the 6th letter of the English alphabet :
'Fox' begins with (an) F / 'F'.
2.
F ( music ) the fourth note in the scale of C major
3.
the 6th highest mark / grade that a student can get for a piece of work, showing that it is very bad and the student has failed :
He got (an) F / 'F' in / for Chemistry.
—see also F-word
■ abbreviation
1.
Fahrenheit :
Water freezes at 32°F.
2.
( BrE ) ( in academic titles ) Fellow of :
FRCM (= Fellow of the Royal College of Music)
3.
Farad