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Dictionary and Thesaurus entries for:

key

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key [a]
 
1)serving as an essential component; "a cardinal rule"; "the central cause of the problem"; "an example that was fundamental to the argument"; "computers are fundamental to modern industrial structure"
    Synonyms :cardinal central fundamental primal 
    See Also: important 
 
2)effective; producing a desired effect; "the operative word"
    Synonyms :operative 
    See Also: important 
 
key [n]
 
1)metal device shaped in such a way that when it is inserted into the appropriate lock the lock's mechanism can be rotated
    Synonyms :
    See Also: device  ignition_key  latchkey  master  shank 
 
2)something crucial for explaining; "the key to development is economic integration"
    Synonyms :
    See Also: explanation 
 
3)pitch of the voice; "he spoke in a low key"
    Synonyms :
    See Also: pitch 
 
4)any of 24 major or minor diatonic scales that provide the tonal framework for a piece of music
    Synonyms :tonality 
    See Also: musical_notation  atonalism  major_key  minor_key  home_key 
 
5)a kilogram of a narcotic drug; "they were carrying two keys of heroin"
    Synonyms :
    See Also: kg  argot 
 
6)a winged often one-seed indehiscent fruit as of the ash or elm or maple
    Synonyms :key_fruit samara 
    See Also: achene 
 
7)United States lawyer and poet who wrote a poem after witnessing the British attack on Baltimore during the War of 1812; the poem was later set to music and entitled `The Star-Spangled Banner' (1779-1843)
    Synonyms :francis_scott_key 
    See Also: attorney  poet 
 
8)a coral reef off the southern coast of Florida
    Synonyms :cay florida_keys 
    See Also: coral_reef  everglade_state 
 
9)(basketball) a space (including the foul line) in front of the basket at each end of a basketball court; usually painted a different color from the rest of the court; "he hit a jump shot from the top of the key"; "he dominates play in the paint"
    Synonyms :paint 
    See Also: space  basketball_court  basketball  foul_line 
 
10)a list of answers to a test; "some students had stolen the key to the final exam"
    Synonyms :
    See Also: list 
 
11)a list of words or phrases that explain symbols or abbreviations
    Synonyms :
    See Also: list  key_word 
 
12)a generic term for any device whose possession entitles the holder to a means of access; "a safe-deposit box usually requires two keys to open it"
    Synonyms :
    See Also: positive_identification 
 
13)mechanical device used to wind another device that is driven by a spring (as a clock)
    Synonyms :winder 
    See Also: mechanical_device  wind  watch_key 
 
14)the central building block at the top of an arch or vault
    Synonyms :headstone keystone 
    See Also: building_block  arch  coign 
 
15)a lever that actuates a mechanism when depressed
    Synonyms :
    See Also: lever  keyboard  action  backspace_key  command_key  return  space_bar  tab  telegraph_key 
 
key [v]
 
1)identify as in botany or biology, for example
    Synonyms :describe discover distinguish identify key_out name 
    See Also: assort  name  naming  designation  identity 
 
2)provide with a key; "We were keyed after the locks were changed in the building"
    Synonyms :
    See Also: furnish 
 
3)vandalize a car by scratching the sides with a key; "His new Mercedes was keyed last night in the parking lot"
    Synonyms :
    See Also: vandalise 
 
4)regulate the musical pitch of
    Synonyms :
    See Also: chord  music 
 
5)harmonize with or adjust to; "key one's actions to the voters' prevailing attitude"
    Synonyms :
    See Also: harmonise 
 

From The Free On-line Dictionary of Computing: (http://www.foldoc.org/, Editor Denis Howe)

1. A value used to identify a record in a database, derived by applying some fixed function to the record. The key is often simply one of the fields (a column if the database is considered as a table with records being rows, see "key field"). Alternatively the key may be obtained by applying some function, e.g. a hash function, to one or more of the fields. The set of keys for all records forms an index. Multiple indexes may be built for one database depending on how it is to be searched.

2. A value which must be fed into the algorithm used to decode an encrypted message in order to reproduce the original plain text. Some encryption schemes use the same (secret) key to encrypt and decrypt a message, but public key encryption uses a "private" (secret) key and a "public" key which is known by all parties.

3. An electromechanical keyboard button.

(2003-07-04)








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