(sō) adverb
1. To this or that or such a degree; to this or that extent; in the same degree, quantity, or proportion: either used alone, the degree being implied or understood: Why so long; or followed by or preceded by a dependent expression introduced by as, that, or but.
2. In this, that, or such a manner; in the same or a like or corresponding manner; in the manner mentioned: often following a clause beginning with as, or preceding one beginning with that.
3. Just as said, directed, suggested, or implied; also, according to fact: referring to a preceding (sometimes following) statement or suggestion.
4. To an extreme degree; extremely; very.
5. The fact being thus: used as an expletive.
6. About as many or as much as stated; thereabouts: I shall stay a day or so.
7. At all events; in any case; at all: now only in the compounds whosoever, whichsoever, etc.
8. According to the truth of what is sworn to or averred: said in oaths or asseverations: So help me God.
9. Indeed! elliptical for Is it so?
10. To such an extent: used elliptically for so much: I love him so!
11. Too: used in emphatic denial: You can so!
12. Indicative of surprise or disapproval: So there you are.
13. So as to follow immediately; then; therefore.
14. Let it be that way; very well.
—conj.
1. With the purpose that: often with that: They left the hotel early so (that) they would not encounter him.
2. In such a way that; as a consequence of which: He consented, so they went away.
3. Obs. As.
—interj.
1. Stay still!
2. Is that so!
3. In nautical parlance, steady! [OE swā]

(sō) noun Music
The fifth of the syllables used in singing the scale: also sol. [See GAMUT]