a word that serves as a key, as to the meaning of another word, a sentence, passage, or the like: Search the database for the keyword “Ireland.”
2.
a word used to encipher or decipher a cryptogram, as a pattern for a transposition procedure or the basis for a complex substitution.
3.
Also called catchword.Library Science. a significant or memorable word or term in the title, abstract, or text of an item being indexed, used as the index entry.
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Reference: No results found in Columbia Electronic Encyclopedia and Crystal Reference Encyclopedia. Would you like to see the 35 entries in other encyclopedias, or search the Web for keyword?
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