Legal Definition
In a legal context, an offer is a promise to do or to give something, usually in a contract negotiation, that is legally binding if accepted by the other party. It sets forth the terms under which one party agrees to enter into a transaction or agreement.
Plain-English Translation
An offer is like saying, 'Here are the exact rules for the deal,' and it's a promise to do something specific, which the other person can then accept. It defines what the person is offering to buy or sell.