so that

Concise Oxford English Dictionary © 2008 Oxford University Press:
so1

▶adverb

• 1 to such a great extent.

  ■ extremely; very much.

  ■ informal used to emphasize a clause or negative statement: that's so not fair.

• 2 to the same extent: he isn't so bad.

• 3 referring back to something previously mentioned: I believe so.

  ■ similarly: so have I.

• 4 in the way described or demonstrated; thus.

▶conjunction

• 1 and for this reason; therefore.

• 2 (so that) with the result or aim that.

• 3 and then.

• 4 introducing a question or concluding statement.

• 5 in the same way; correspondingly.

– phrases
and so on (or forth) and similar things; et cetera.
only so much only a limited amount.
so be it an expression of acceptance or resignation.
so long! informal goodbye.
so much as [with neg.] even: without so much as a word.
so to speak (or say) indicating that one is talking in an unusual or metaphorical way.

– origin OE swā, of Gmc origin.

Concise Oxford English Dictionary © 2008 Oxford University Press:
so2

▶noun variant spelling of soh.