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A group of letters and numbers in a specific order that has special significance in a computer system.
One of a fixed set of symbols built into the syntax of a language. Typical keywords would be if, then, else, print, goto, while, switch. There are usually restrictions about reusing keywords as names for user-defined objects such as variables or procedures. Languages vary as to what is provided as a keyword and what is a library routine, for example some languages provide keywords for input/output operations whereas in others these are library routines.
A small set of words designed to convey the subject of a technical article. Some publications specify a fixed set of keywords from which those for a particular article should be chosen.
keyword(1) A word used in a text search.
(2) A word in a text document that is used in an index to best describe the contents of the document.
(3) A reserved word in a programming or command language.