MUCH definition: great in quantity, measure, or degree. See examples of much used in a sentence. 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. 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. Much is now generally used with uncountable nouns. The equivalent used with countable nouns is many. In positive contexts, much is widely avoided: I have a lot of money instead of I have much money. There are some exceptions to this, however: I have much hope for the future. A lot of these cases are emotive transitive verbs and nouns. I have much need for a new assistant. In parallel, I need. Define much. much synonyms, much pronunciation, much translation, English dictionary definition of much. adj. more , most Great in quantity, degree, or extent: not. Much definition: Great in quantity, degree, or extent. 12 meanings: 1. a. a great quantity or degree of b. (as pronoun) 2. → See a bit much 3. → See as much 4. → See make much of 5.. Click for more definitions. Much means a large amount or degree of something. e.g., She didn't get much sleep last night. Delve into the comprehensive meaning, definition, and fascinating etymology of much. This Self Exploration Academy glossary entry provides rich examples, usage nuances, and historical context for this essential English word.