A named unit of data that, in some contexts, is considered indivisible and in other contexts may consist of data items. 2. A named identifier of each of the entities and their attributes that are represented in a database. 3. A basic unit of information built on standard structures having a unique meaning and distinct units or values. 4. In electronic recordkeeping, a combination of characters or bytes referring to one separate item of information, such as name, address, or age.