key words

keyword

[kee-wurd]
noun
1.
a word that serves as a key, as to the meaning of another word, a sentence, passage, or the like.
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 a document or other item being indexed, used as the index entry.
4.
Digital Technology. a word used to classify or organize digital content, or to facilitate an online search for information: Search the database for the keyword “Ireland.”
Also, key word.


Origin:
1855–60; key1 + word

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
keyword (ˈkiːˌwɜːd)
 
n
1.  a word used as a key to a code
2.  any significant word or phrase, esp a word used to describe the contents of a document

Collins English Dictionary - Complete & Unabridged 10th Edition
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