Define much. much synonyms, much pronunciation, much translation, English dictionary definition of much. adj. more , most Great in quantity, degree, or extent: not. Synonyms for MUCH: significant, important, major, big, historic, substantial, meaningful, eventful; Antonyms of MUCH: little, small, slight, trivial, minor. Find 136 different ways to say MUCH, along with antonyms, related words, and example sentences at Thesaurus.com. 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. Much means a large amount or degree of something. e.g., She didn't get much sleep last night. 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. The meaning of MUCH is great in quantity, amount, extent, or degree. How to use much in a sentence. MUCH definition: great in quantity, measure, or degree. See examples of much used in a sentence. 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 definition: 1. a large amount or to a large degree: 2. a far larger amount of something than you want or need…. Learn more.