(law) An agreement in which an offeror's offer can be accepted only by the performance of an act by the offeree; a "promise for a performance".

A card game in which four players, forming two partnerships, first bid then play by taking tricks.

(law, banking) A contractual agreement governing the handling of deposited assets, for example in a bank.

(law) A contract that involves an exchange of goods, services or property to be exchanged from seller (or vendor) to buyer (or purchaser) for an agreed upon value in money (or money equivalent) paid or the promise to pay same.

The right of individuals to bargain freely among themselves the terms of their own contracts, without government interference.

(law) A category of contract used in labor law to attribute right and responsibilities between parties to a bargain.

(Internet) An agreement between a spammer and their ISP, where the spammer pays additional charges in order to be exempted from the provider's terms of service, which would otherwise prohibit spamming.

A system for managing contracts.

(law) An agreement in which in which one party agrees to supply as much of a good or service as is required by the other party, and in exchange the other party expressly or implicitly promises that it will obtain its goods or services exclusively from the first party.

(finance) A standardized contract, traded on a futures exchange, to buy or sell a standardized quantity of a specified commodity (or financial instrument) of standardized quality at a certain date in the future, at a stated price (the futures price).