n. 1. (also 'S.O.') Abbrev. for Significant
Other, almost invariably written abbreviated and pronounced
/S-O/ by hackers. Used to refer to one's primary
relationship, esp. a live-in to whom one is not married.
See MOTAS, MOTOS, MOTSS.
2. The Shift Out control character in ASCII (Control-N, 0001110).
