Definitions of much:

• noun:   a great amount or extent

  Example: "They did much for humanity"

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

  Example: "Much the same thing happened every time"

• adverb:   very

  Example: "He was much annoyed"

• adverb:   to a great degree or extent

  Example: "She's much better now"

• adverb:   frequently or in great quantities

  Example: "I don't drink much"

• adverb:   to a very great degree or extent

  Example: "We enjoyed ourselves very much"

• name:  A surname (very rare: popularity rank in the U.S.: #50300)