Enough modifies both countable and uncountable nouns.
"There is enough money to buy a car."
"I have enough books to read."
1.sufficient to answer a need or requirement;adequate:
I have enough for myself.
2.that's enough! that will do: used to put an end to an action, speech, performance, etc
"Part of being a winner is knowing when enough is enough. Sometimes you have to give up the fight and walk away, and move on to something that's more productive. "