f

f

f¹ or F [ef]

n.

pl. f's, F's

1. the sixth letter of the English alphabet: a modification of the Old Greek digamma (F), ultimately from the Phoenician

2. any of the speech sounds that this letter represents, as, in English, the (f) of fire

3. a type or impression for f or F

4. the sixth in a sequence or group

5. an object shaped like F

adj.

1. of f or F

2. sixth in a sequence or group

3. shaped like F

f²

abbrev.

1. femto-

2. Physics frequency

3. furlong(s)

f³

abbrev.

[It forte] Musical Direction loud(ly)