Part of the test phase of software development where, as new ref="module.php?name=Lexikon&file=search&eid=1&query=modules">modules are integrated into the system and the added functionality is tested, previously tested functionality is re-tested to assure that no new module has corrupted the system. [Bennatan, E.M., "Software Project Management", 2nd edition, McGraw-Hill International, 1992]. (1995-12-04)
