Definitions from Wiktionary (F)

▸ noun:  (printing, abbreviation) Folio, paper and book size (10"-12.5" x 15"-20")
▸ noun:  (euphemistic) fuck
▸ noun:  An academic grade, specifically:
▸ noun:  A failing grade, with the next best grade being either a D or an E (some institutions issue Es instead of Fs).
▸ noun:  (UK) A grade lower than E but higher than G.
▸ noun:  A grade of black-lead pencil (originally an abbreviation of fine).
▸ noun:  In the American Library Association, a folio-sized book, over 30 cm in height.
▸ noun:  Alternative form of f.
▸ adjective:  Abbreviation of false. [Untrue, not factual, factually incorrect.]
▸ adjective:  Abbreviation of female. [Belonging to the sex which typically produces eggs (ova), or to the gender which is typically associated with it.]
▸ adjective:  (philately) Abbreviation of fine. [Senses referring to subjective quality.]
▸ adjective:  (numismatic slang) Abbreviation of fine. [Senses referring to subjective quality.]
▸ noun:  Abbreviation of fellow. [(chiefly in the plural, also figuratively) A companion; a comrade.]
▸ noun:  (nautical) Abbreviation of fog, as in a ship's log. [(uncountable) A thick cloud that forms near the ground; the obscurity of such a cloud.]
▸ noun:  (US, meteorology) Initialism of Fujita (followed by a number when used in a rating on the Fujita scale and indicating the intensity of a tornado).
▸ noun:  Initialism of function (followed by a number when used on or referencing a function key of a computer keyboard). [What something does or is used for.]
▸ noun:  (bacteriology) Abbreviation of fertility factor.
▸ noun:  Abbreviation of various proper names.
▸ noun:  Abbreviation of Fahrenheit.
▸ noun:  Abbreviation of Father, as a title given to priests. [(Christianity) God, the father of Creation.]
▸ noun:  Abbreviation of French. [(chiefly uncountable) The language of France, shared by the neighboring countries Belgium, Monaco, and Switzerland and by former French colonies around the world.]
▸ noun:  Abbreviation of Friday. [The sixth day of the week in many religious traditions, and the fifth day of the week in systems using the ISO 8601 norm; the Muslim “Sabbath”; it follows Thursday and precedes Saturday.]
▸ verb:  (euphemistic) Initialism of fuck. [(vulgar, colloquial, intransitive) To have sexual intercourse; to copulate.]

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