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key field[′kē ‚fēld]
A field in a segment or record that holds the value of a key to that record.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
A field of a database (typically a relational database) table which together form a unique identifier for a record (a table entry). The aggregate of these fields is usually referred to simply as "the key".
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)
key fieldA field in a record that holds unique data which identifies that record from all the other records in the file or database. Account number, product code and customer name are typical key fields. As an identifier, each key value must be unique in each record. See sort key.
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