1. A large quantity or amount: Much has been written. 2. Something great or remarkable: The campus wasn't much to look at. MUCH definition: great in quantity, measure, or degree. See examples of much used in a sentence. Easy Learning Spanish Grammar. Owned by Bell Media, the channel primarily airs general entertainment programming targeting a teenage and young adult audience. It is headquartered at 299 Queen Street West in downtown Toronto, formerly billed on-air as the MuchMusic World Headquarters. The meaning of MUCH is great in quantity, amount, extent, or degree. How to use much in a sentence. We use the quantifiers much, many, a lot of, lots ofto talk about quantities, amounts and degree. We can use them with a noun (as a determiner) or without a noun (as a pronoun). Synonyms for MUCH: significant, important, major, big, historic, substantial, meaningful, eventful; Antonyms of MUCH: little, small, slight, trivial, minor, insignificant, unimportant, negligible (in combinations such as ' as much ', ' this much ') Used to indicate, demonstrate or compare the quantity of something. MUCH definition: 1. a large amount or to a large degree: 2. a far larger amount of something than you want or need…. Learn more. Much is used as an adjective or adverb, but it always means a large quantity, extent, or degree. When something hurts very much, it's very painful, and when your friend says your gift is very much appreciated, she's emphasizing how happy it made her.