from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A word that serves as a key to a code or cipher.
  • noun A significant or descriptive word.
  • noun A word used as a reference point for finding other words or information.

from The Century Dictionary.

  • noun A word which serves as a key, guide, or explanation to the meaning, use, or pronunciation of other words, or to other matters.

from the GNU version of the Collaborative International Dictionary of English.

  • noun A word used as an entry point into an index which serves to identify files, records, texts, or other data containing the key or some related word, such as a synonym. It is a type of key{15}.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun any word used as the key to a code
  • noun information science Any word used in a reference work to link to other words or other information.
  • noun programming A reserved word used to identify a specific command, function etc.
  • noun linguistics Any word that occurs in a text more often than normal.
  • verb transitive To tag with keywords, as for example to facilitate searching.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a significant word used in indexing or cataloging
  • noun a word that is used as a pattern to decode an encrypted message


from Wiktionary, Creative Commons Attribution/Share-Alike License

key +‎ word


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  • Today, a search on the Internet about the Chinese search is a big problem for the Chinese word is never easy, unlike Latin spaces between each word separated, so PunBB or other forum on Chinese The poor search results is normal, the current forum for the various Chinese search only for a simple keyword search % keyword%, and the PunBB search on the word of Chinese extraction null and void and will only serve to extract a large number of sentences, and search results Is not accurate.

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  • For example, I did a title keyword search using “internet” and “law” at this site and uncovered, among other things, the following recent thesis, available in PDF:

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