S

Meanings

Noun

• Abbreviation of sextodecimo; a book size, 15-17.5 cm in height.
• South.
• Abbreviation of season .
• soprano.

Proper Noun

• An axiomatic set theory, developed by logician George Boolos, in which several of the axioms of ZF are derivable as theorems.

Origin

• From the first letter of set and of stage, two fundamental concepts of the theory.