What is "keyword"

Key \Key\ (k[=e]), n. [OE. keye, key, kay, AS. c[ae]g.]

1. An instrument by means of which the bolt of a lock is shot or drawn; usually, a removable metal instrument fitted to the mechanism of a particular lock and operated by turning in its place.

2. A small device which is inserted into a mechanism and turned like a key to fasten, adjust, or wind it; as, a watch key; a bed key; the winding key for a clock, etc.

3. One of a set of small movable parts on an instrument or machine which, by being depressed, serves as the means of operating it; the complete set of keys is usually called the keyboard; as, the keys of a piano, an organ, an accordion, a computer keyboard, or of a typewriter. The keys may operate parts of the instrument by a mechanical action, as on a piano, or by closing an electrical circuit, as on a computer keyboard. See also senses 12 and 13.

4. A position or condition which affords entrance, control, pr possession, etc.; as, the key of a line of defense; the key of a country; the key of a political situation. Hence, that which serves to unlock, open, discover, or solve something unknown or difficult; as, the key to a riddle; the key to a problem. Similarly, see also senses 14 and 1

5. Those who are accustomed to reason have got the true key of books.
   --Locke.

   Who keeps the keys of all the creeds.
   --Tennyson.

   5. That part of a mechanism which serves to lock up, make fast, or adjust to position.

6. (Arch.)

   1. A piece of wood used as a wedge.

   2. The last board of a floor when laid down.

7. (Masonry)

   1. A keystone.

   2. That part of the plastering which is forced through between the laths and holds the rest in place.

8. (Mach.)

   1. A wedge to unite two or more pieces, or adjust their relative position; a cotter; a forelock. See Illusts. of Cotter, and Gib.

   2. A bar, pin or wedge, to secure a crank, pulley, coupling, etc., upon a shaft, and prevent relative turning; sometimes holding by friction alone, but more frequently by its resistance to shearing, being usually embedded partly in the shaft and partly in the crank, pulley, etc.

9. (Bot.) An indehiscent, one-seeded fruit furnished with a wing, as the fruit of the ash and maple; a samara; -- called also key fruit.

10. (Mus.)

    1. A family of tones whose regular members are called diatonic tones, and named key tone (or tonic) or one (or eight), mediant or three, dominant or five, subdominant or four, submediant or six, supertonic or two, and subtonic or seven. Chromatic tones are temporary members of a key, under such names as `` sharp four,'' ``flat seven,'' etc. Scales and tunes of every variety are made from the tones of a key.

    2. The fundamental tone of a movement to which its modulations are referred, and with which it generally begins and ends; keynote.

       Both warbling of one song, both in one key.
       --Shak.

11. Fig: The general pitch or tone of a sentence or utterance.

    You fall at once into a lower key.
    --Cowper.

12. (Teleg.) A metallic lever by which the circuit of the sending or transmitting part of a station equipment may be easily and rapidly opened and closed; as, a telegraph key.

13. any device for closing or opening an electric circuit, especially as part of a keyboard, as that used at a computer terminal or teletype terminal.

14. A simplified version or analysis which accompanies something as a clue to its explanation, a book or table containing the solutions to problems, ciphers, allegories, or the like; or (Biol.) a table or synopsis of conspicuous distinguishing characters of members of a taxonomic group.

15. (Computers) A word or other combination of symbols which serves as an index identifying and pointing to a particular record, file, or location which can be retrieved and displayed by a computer program; as, a database using multi-word keys. When the key is a word, it is also called a keyword.

    Key bed. Same as Key seat.

    Key bolt, a bolt which has a mortise near the end, and is secured by a cotter or wedge instead of a nut.

    Key bugle. See Kent bugle.

    Key of a position or Key of a country. (Mil.) See Key, 4.

    Key seat (Mach.), a bed or groove to receive a key which prevents one part from turning on the other.

    Key way, a channel for a key, in the hole of a piece which is keyed to a shaft; an internal key seat; -- called also key seat.

    Key wrench (Mach.), an adjustable wrench in which the movable jaw is made fast by a key.

    Power of the keys (Eccl.), the authority claimed by the ministry in some Christian churches to administer the discipline of the church, and to grant or withhold its privileges; -- so called from the declaration of Christ, ``I will give unto thee the keys of the kingdom of heaven.''
    --Matt. xvi. 19.

keyword \key"word`\, n. 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]; as, a boolean combination of keywords is more effective for information retrieval than a single key[15].

also key-word, 1807, from key (n.1) + word (n.). Originally in reference to codes and ciphers.

n. 1 Any word used as the key to a code. 2 (context information science English) Any word used in a reference work to link to other words or other information. 3 (context programming English) A reserved word used to identify a specific command, function(,) etc. 4 (context linguistics English) Any word that occurs in a text more often than normal. vb. (context transitive English) To tag with keywords, as for example to facilitate searching.

In corpus linguistics a key word is a word which occurs in a text more often than we would expect to occur by chance alone. Key words are calculated by carrying out a statistical test (e.g., loglinear or chi-squared) which compares the word frequencies in a text against their expected frequencies derived in a much larger corpus, which acts as a reference for general language use.

Keyword may refer to:

• Keyword (linguistics), word which occurs in a text more often than we would expect to occur by chance alone
• Keyword (computer programming), word or identifier that has a particular meaning to the programming language
• Keyword (cryptography), word used as the key to determine the letter matchings of the cipher alphabet to the plain alphabet
• Index term, a term used as a keyword to retrieve documents in an information system such as a catalog or a search engine
• Keyword (rhetoric), a word that academics use to reveal the internal structure of an author's reasoning
• Keywords: A Vocabulary of Culture and Society, 1973 non-fiction book by Raymond Williams

fr:Mot clef id:Kata kunci ja:キーワード pl:Słowo kluczowe sk:Deskriptor

Keywords are the words that academics use to reveal the internal structure of an author's reasoning. While they are used primarily for rhetoric, they are also used in a strictly grammatical sense for structural composition, reasoning, and comprehension. Indeed, they are an essential part of any language.

There are many different types of keyword categories including: Conclusion, Continuation, Contrast, Emphasis, Evidence, Illustration and Sequence. Each category serves its own function, as do the keywords inside of a given category.

When someone uses a search engine, they type in one or more words describing what they are looking for: 'Norwich florist' or 'cheap holidays Greece', for example. These words or phrases are known as keywords.

"Keyword" / "Maze" is Tohoshinki's 21st Japanese single, released on March 12, 2008. The single is the fifth and last installment of the song "Trick" in the album T. It sold the most copies out of the TRICK singles in the first week, with a total of 21,097.