buy

If you buy something, you give money and the thing becomes yours.

Example: Could you buy some milk at the store?

If money buys something, it is enough money to pay for it.

Example: $10 doesn't even buy a case of beer.

If you buy (somebody) time, you stop something from happening soon so that you have time to prepare for it.

Example: She went to the washroom to buy time. She didn't want to answer before Kate arrived.

If you buy an idea, you believe it.

Example: Your mother won't buy the story about getting lost.

A buy is something that someone has bought, usually for a cheap price.

Example: This dress was a good buy. It was on sale.