We use the quantifiers much, many, a lot of, lots of to talk about quantities, amounts and degree. We can use them with a noun (as a determiner) or without a noun (as a pronoun). …
Amounting to or consisting of a large indefinite number: many friends. 2. Being one of a large indefinite number; numerous: many a child; many another day. 1. The majority of the people; the masses: "The many fail, the one succeeds" (Tennyson). 2. A large indefinite number: A good many of the workers had the flu.
You use many in expressions such as 'not many', 'not very many', and 'too many' when replying to questions about numbers of things or people.
The meaning of MANY is consisting of or amounting to a large but indefinite number. How to use many in a sentence.