Definitions for "Reserved word"
This is an alternative phrase for keyword.
Word used in the Pascal source code and has a predefined meaning and usage. Reserved words cannot be used as identifiers.
In programming languages, a keyword that may not be used as an identifier. (I) (2) A word used in a source program to describe an action to be taken by the program or compiler. It must not appear in the program as a user-defined name or a system name. (3) A word that has been set aside for special use in the SQL standard.
a Visual Basic command
A set of characters recognized by UNIX and related to a specific program, function, or command.
Keywords:  sql, guide, plus, book, search
(SQL*Plus User's Guide and Reference; search in this book)