F

An academic grade, specifically:

A failing grade, with the next best grade being either a D or an E (some institutions issue Es instead of Fs).

An academic grade, specifically:

A grade lower than E but higher than G.

A grade of black-lead pencil (originally an abbreviation of fine).

In the American Library Association, a folio-sized book, over 30 cm in height.

Abbreviation of fellow.

Abbreviation of fog, as in a ship's log.

Initialism of Fujita (followed by a number when used in a rating on the Fujita scale and indicating the intensity of a tornado).

Initialism of function (followed by a number when used on or referencing a function key of a computer keyboard).

Abbreviation of fertility factor.

Initialism of fuck.

Abbreviation of false.

Abbreviation of female.

Abbreviation of fine.

Abbreviation of fine.

The sixth letter of the English alphabet, called ef and written in the Latin script.

The sixth numeral symbol of the English alphabet, called ef and written in the Latin script.

The fourth note of the diatonic scale of C major, called fa in solfège.

The scale or key which has that note for its tonic.

On a piano keyboard, the white key next to the left of each group of three black keys (see figure).

The degree of a staff assigned to such a key or tone; a note on such a degree.

Ford Motor Company

An expression of sympathy or pity; see F in the chat.

Abbreviation of various proper names.

Abbreviation of Fahrenheit.

Abbreviation of Father, as a title given to priests.

Abbreviation of French.

Abbreviation of Friday.