To spoil is to destroy something, to diminish the character of something, to overindulge someone, or to go bad and become unusable or inedible.
(verb)
- An example of spoil is when you ruin someone's cake.
- An example of spoil is when you prevent someone from having a good time.
- An example of spoil is when you over indulge a child, especially to the point that the child's character is weakened and he becomes a brat.
- An example of spoil is when food goes rotten.