transactiontrans·ac·tion /trænˈzækʃən/ noun [countableC]1FINANCEa payment, or the process of making oneThe auditors will conduct regular checks on allfinancial transactions.
The bank offers a current account aimed at businesses with regularinternational transactions.
2COMMERCE a business dealTwo Mexican firms have completed a $300 million transaction to combine their consumer businesses.
→ related-party transaction3FINANCE an occasion when a company sells shares, bonds etc or exchanges them for other shares etcThe swap of junk bonds was carried out as part of a complicated debt-reduction transaction.
4computing a single action that makes a few related changes to the data in a database or other computer programA database transaction is a unit of interaction in a database management system.