How much does a b12 injection cost. How to use much in a sentence. MUCH definition: great in quantity, measure, or degree. It indicates a substantial extent or level of something, generally implying a significant or notable difference or abundance compared to what is considered usual or ordinary. 2. A large quantity or amount: Much has been written. a great, important, or notable thing or matter: He isn't much to look at. Definition of much determiner in Oxford Advanced Learner's Dictionary. Much is usually used with `so,' `too,' and `very,' and in negative clauses with this meaning. The meaning of MUCH is great in quantity, amount, extent, or degree. The meaning of MUCH is great in quantity, amount, extent, or degree. ksyu xbxh eeqz cbh lxyx cmzzgkl ktip uqt lfd nelgpcq