1. To make an express demand, or arrangement, as a condition of an accordance: The private school has rules that stipulate that students must wear uniforms.
2. To arrange expressly, or to specify in terms of an agreement: Carl, the auto salesman, stipulated a set price for the new car.

The bank stipulated that if interest rates went down too far, the financial investment would have to be cancelled and that was what was in the letter that had just arrived.

The law stipulates that new cars must have seat belts for the driver and every passenger.

The couple's contract with the decorator stipulates the maximum amount of money he can charge them.

3. To require as an essential condition in making an amity: A total disarmament was stipulated if there was to be a peace treaty between the two countries.
4. To promise, while making a mutual understanding: The bookseller stipulated that the books would be delivered by the date the customer had specified.
5. In law, to accept (a proposition) without requiring that it be established by proof: Judge Havilland was stipulating that the existence of certain facts or that an expert witness had to be qualified to present reasonable data to the court.