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. MUCH definition: great in quantity, measure, or degree. See examples of much used in a sentence. (in combinations such as ' as much ', ' this much ') Used to indicate, demonstrate or compare the quantity of something. 1. A large quantity or amount: Much has been written. 2. Something great or remarkable: The campus wasn't much to look at. 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. Easy Learning Spanish Grammar. 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). The meaning of MUCH is great in quantity, amount, extent, or degree. How to use much in a sentence. Synonyms for MUCH: significant, important, major, big, historic, substantial, meaningful, eventful; Antonyms of MUCH: little, small, slight, trivial, minor, insignificant, unimportant, negligible 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.