Definition of "Much" :

noun: a great amount or extent

"They did much for humanity."

adjective: (quantifier used with mass nouns) great in quantity or degree or extent

"Not much rain."

adverb: (degree adverb used before a noun phrase) for all practical purposes but not completely

"Much the same thing happened every time."

adverb: very

"He was much annoyed."

adverb: to a great degree or extent

"She's much better now."

adverb: to a very great degree or extent

"We enjoyed ourselves very much."

adverb: frequently or in great quantities

"I don't drink much."