Read the dictionary definition of enough. All definitions for this word.
1. an adequate quantity; a quantity that is large enough to achieve a purpose
1. enough is as good as a feast
2. there is more than a sufficiency of lawyers in this country
2. sufficient for the purpose
1. an adequate income
2. the food was adequate
3. enough food
4. food enough
3. as much as necessary
1. Have I eaten enough?
2. I've had plenty, thanks