- noun software that prevents more than one user writing data to a record at the same time
- noun a software method of preventing more than one user writing data to a record at the same time. The first user’s software sets a locked flag for the record during write operations, preventing other users from corrupting data by also writing data.
- A technique employed to help maintain data integrity within a multiuser environment. When a user accesses any given record, all other users are blocked from doing so. Once the accessed record is updated, it again becomes freely available.