1. sf - Noun
2. sf - Adjective
3. Sf - Proper noun
(fiction) Initialism of science fiction or speculative fiction, often used to avoid having to choose between the two.
Initialism of square feet.
Initialism of spontaneous fission.
(basketball) Initialism of small forward.
(sports) Abbreviation of semifinal.
Coordinate terms: QF, F, FA, FB, FC, FD
Initialism of San Francisco.
(Ireland, UK politics) Initialism of Sinn Féin; an Irish political party.
(video games) Initialism of Street Fighter.
(motor racing) Initialism of Super Formula.
SF
(in personal ads) Initialism of smoker-friendly: not objecting to people who smoke tobacco
(dated) Alternative form of SF (science fiction)
Abbreviation of significant figure(s).
Sf (plural Sfs)
a book size one sixty-fourth of the size of a standard uncut sheet of paper (less 7.5 cm (3") in height)