key word

Noun	1.	key word - a word that is used as a pattern to decode an encrypted message key - a list of words or phrases that explain symbols or abbreviations
	2.	key word - a significant word used in indexing or cataloging word - a unit of language that native speakers can identify; "words are the blocks from which sentences are made"; "he hardly said ten words all morning" index - an alphabetical listing of names and topics along with page numbers where they are discussed

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