sf

noun1

1. •
   Abbreviation of significant figure(s).

adjective1

1. •
   Initialism of smoker-friendly: not objecting to people who smoke tobacco.

noun6

1. •
   Initialism of science fiction or speculative fiction, often used to avoid having to choose between the two.
2. •
   Initialism of square feet.
3. •
   Abbreviation of semifinal.
4. •
   Initialism of single female.
5. •
   Initialism of small forward.
6. •
   Initialism of spontaneous fission.

noun1

1. •
   a book size one sixty-fourth of the size of a standard uncut sheet of paper (less 7.5 cm (3") in height)