I. adverb
Date: 13th century
: by the amount indicated or suggested
if they lose their way, so much the better for us
II. pronoun
Date: 14th century
1. : something (as an amount or price) unspecified or undetermined
charge so much a mile
2. : all that can be or is to be said or done
so much for the history of the case
III. adjective
Date: 1557
— used as an intensive
the house burned like so much paper
sounded like so much nonsense