is a word
with special significance, in particular any word used as the key
to a code
or used in a reference work to link to other words or other information.
The term keyword in reference to Search Engine Marketing (SEM) usually refers to a word or keyword phrase (combination of words, such as 'Chicago Courier Service') used to find relevant and useful web pages.
It may also mean:
or a word which occurs in a text more often than we would expect to occur by chance alone
- Keyword (search) or keyword phrase, a word or phrase to find information in either physical or electronic libraries
- Keyword (Internet search) or keyword phrase, a word or a phrase used to find useful results in internet searches
- Smart keyword, shortcut for bookmarks in Firefox
In a non-computer sense: