A written agreement (or property or money) delivered to a third party or put in trust by one party to a contract to be returned after fulfillment of some condition WordNet 3.0 & Open English WordNet

An escrow is a contractual arrangement in which a third party receives and disburses money or property for the primary transacting parties, with the disbursement dependent on conditions agreed to by the transacting parties. Wikipedia

Basic financial concept Wikidata

A deed, bond, or other written engagement, held by a third person until some act is done or some condition is performed. OmegaWiki

A written instrument, such as a deed, temporarily deposited with a neutral third party (the escrow agent), by the agreement of two parties to a valid contract. The escrow agent will deliver the document to the benefited party when the conditions of the contract have been met. The depositor has no control over the instrument in escrow. Wiktionary