(noun) A fully grown human or animal.
"This is what love does and continues to do. It tastes like honey to adults and milk to children."
"A cynic is a man who knows the price of everything, and the value of nothing."
"If you act like an adult when you're a kid you can afford to act like a kid the rest of your life."
"Adults are just obsolete children and the hell with them."
"Adults are only kids grown up."