key 1
(kē)n. pl. keys 1. a. A notched and grooved, usually metal implement that is turned to open or close a lock.
b. A similar implement or an electronic device used for opening, winding, or starting something: the key of a wind-up alarm clock; the new car's electronic key.
c. A device, such as a wedge or pin, inserted to lock together mechanical or structural parts.
d. A keycard.
2. A determining factor in accomplishing or achieving something: One key to the store's success has been consistent customer service.
3. a. Something that provides access to or understanding of something else: The key to the mystery was a drug store receipt.
b. A set of answers to a test.
c. A table, gloss, or cipher containing correspondences, as for decoding or interpreting something.
d. Computers A number used by a cryptographic algorithm to encrypt or decrypt data.
4. Architecture The keystone in the crown of an arch.
5. a. A button or lever that is depressed to operate a machine.
b. A button that is depressed to cause a corresponding character or function to be typed or executed by a typewriter or to be accepted as input by a computer.
c. Music A button or lever that is depressed with the finger to produce or modulate the sound of an instrument, such as a clarinet or piano.
6. Music a. A tonal system consisting of seven tones in fixed relationship to a tonic, having a characteristic key signature and being the structural foundation of the bulk of Western music; tonality.
b. The principal tonality of a work: an etude in the key of E.
7. The pitch of a voice or other sound.
8. A characteristic tone or level of intensity, as of a speech or sales campaign. Often used in combination: high-key; low-key.
9. Botany A samara.
10. An outline of the distinguishing characteristics of a group of organisms, used as a guide in taxonomic identification.
11. Basketball An area at each end of the court between the baseline and the foul line and including the jump-ball circle at the foul line: a jump shot from the top of the key.
12. The act of replacing portions of a video or photograph containing a preselected color with material from a separate image, as by chroma key.
adj. Of crucial importance; significant: key decisions; the key element of the thesis.
v. keyed, key·ing, keys
v.tr.1. To lock with a key.
2. To be the determining or crucial factor in: a double that keyed a three-run rally in the fifth inning.
3. Architecture To furnish (an arch) with a keystone.
4. Music To regulate the pitch of.
5. To bring into harmony; adjust or adapt: "achievement tests that are more clearly keyed to what students are held responsible for in high school" (New York Times).
6. To cause to pay attention to: school officials who were keyed into the dietary needs of students.
7. To supply with a key of correspondences or with corresponding references: keyed the pages in the edited book to illustrations in the manuscript.
8. a. To operate (a device), as for typesetting, by means of a keyboard.
b. To enter (data) into a computer by means of a keyboard.
9. To identify (a biological specimen).
10. To vandalize or mar by scratching with a key: Vandals keyed the cars left in the parking garage.
11. To produce, replace, or include by chroma key.
v.intr.1. To pay close attention; focus: improved service by keying on customer complaints; keyed into the main points of the lecture.
2. Sports To watch or cover an opposing player closely in an effort to limit the player's effectiveness. Used with on: "[She] still carries the burden of scoring ... even though opponents key on her throughout every game" (Josh Barr).
3. To replace portions of a video or photograph containing a preselected color with material from a separate image, as by chroma key.
Phrasal Verb: key up To make intense, excited, or nervous: The actors were keyed up before the opening.
Idioms: in key In consonance with other factors.
out of key Not in consonance with other factors.
[Middle English kai, kei, from Old English cǣg.]
key 2
(kē)n. pl. keys A low offshore island or reef, especially in the Gulf of Mexico; a cay.
[Alteration (influenced by
key, variant of
quay) of Spanish
cayo; see
cay.]
key 3
(kē)n. pl. keys Slang A kilogram of marijuana, cocaine, or heroin.
[Shortening and alteration of
kilogram.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
key
(kiː) n1. (Mechanical Engineering) a metal instrument, usually of a specifically contoured shape, that is made to fit a lock and, when rotated, operates the lock's mechanism
2. (Mechanical Engineering) any instrument that is rotated to operate a valve, clock winding mechanism, etc
3. (Mechanical Engineering) a small metal peg or wedge inserted into keyways
4. (Mechanical Engineering) any of a set of levers operating a typewriter, computer, etc
5. (Instruments) any of the visible parts of the lever mechanism of a musical keyboard instrument that when depressed set in motion the action that causes the instrument to sound
6. (Classical Music)
a. Also called: tonality any of the 24 major and minor diatonic scales considered as a corpus of notes upon which a piece of music draws for its tonal framework
b. the main tonal centre in an extended composition: a symphony in the key of F major.
c. the tonic of a major or minor scale
7. something that is crucial in providing an explanation or interpretation: the key to adult behaviour lies in childhood.
8. a means of achieving a desired end: the key to happiness.
9. a means of access or control: Gibraltar is the key to the Mediterranean.
10. a list of explanations of symbols, codes, etc
11. a text that explains or gives information about a work of literature, art, or music
12. Also called: key move the correct initial move in the solution of a set problem
13. (Biology) biology a systematic list of taxonomic characteristics, used to identify animals or plants
14. (Photography)
photog painting the dominant tonal value and colour intensity of a picture. See also
low-key3,
high-key 15. (Electrical Engineering)
electrical engineering a. a hand-operated device for opening or closing a circuit or for switching circuits
b. a hand-operated switch that is pressed to transmit coded signals, esp Morse code
16. (Building) the grooving or scratching of a surface or the application of a rough coat of plaster, etc, to provide a bond for a subsequent finish
17. pitch: he spoke in a low key.
18. a characteristic mood or style: a poem in a melancholic key.
19. level of intensity: she worked herself up to a high key.
20. (Railways) railways a wooden wedge placed between a rail and a chair to keep the rail firmly in place
21. (Building) a wedge for tightening a joint or for splitting stone or timber
23. (Botany) botany any dry winged fruit, esp that of the ash
24. (Photography) (modifier) photog determining the tonal value of a photograph: flesh colour is an important key tone.
adjof great importance; crucial: a key issue.
vb (
mainly tr)
25. (foll by to) to harmonize (with): to key one's actions to the prevailing mood.
26. to adjust or fasten with a key or some similar device
27. to provide with a key or keys
28. (Law) to scratch the paintwork of (a car) with a key
29. (Printing, Lithography & Bookbinding) (often foll by up) to locate the position of (a piece of copy, artwork, etc) on a layout by the use of symbols
30. (Computer Science) (
also intr) another word for
keyboard3 31. to include a distinguishing device in (an advertisement, etc), so that responses to it can be identified
32. (Building) to provide a keystone for (an arch)
[Old English cǣg; related to Old Frisian kēi, Middle Low German keie spear]
ˈkeyless adj
key
(kiː) n (Physical Geography) a variant spelling of
cay
Key
(kiː) n (Biography) John (Phillip). born 1961, New Zealand politician; prime minister from 2008
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
key1
(ki)
n., pl. keys,
adj., v. n. 1. a small metal instrument specially cut to fit into a lock and move its bolt.
2. any of various devices functioning as a key: the key of a clock.
3. something that affords a means to achive, master, or understand something else: the key to happiness; the key to training a dog.
4. something that controls entrance to a place: Gibraltar is the key to the Mediterranean.
5. a book or other text containing the solutions or translations of material given elsewhere, as testing exercises.
6. a systematic explanation of abbreviations, symbols, and the like used in a dictionary, map, etc.:
pronunciation key. Compare
legend (def. 4). 7. the system, method, pattern, etc., used to decode or decipher a cryptogram.
8. one of the buttons on the keyboard of a typewriter, computer, or the like that are pressed to operate the device.
9. a. (in a keyboard instrument) one of the levers that when depressed by the performer sets in motion the playing mechanism.
b. (on a woodwind instrument) a metal lever that opens and closes a vent.
c. the relationship perceived between all tones in a given unit of music and a single tone or a keynote; tonality.
d. the principal tonality of a composition.
10. tone or pitch, as of voice: to speak in a high key.
11. mood or characteristic style.
12. degree of intensity, as of feeling or action.
13. a pin, bolt, wedge, or other piece inserted in a space to lock or hold parts of a mechanism or structure together.
14. a contrivance for grasping and turning a bolt, nut, etc.
15. a group of characters that identifies a record in a database or other computer file.
16. a. a device for opening and closing electrical contacts, as a lever used to produce signals in telegraphy.
b. a hand-operated switching device capable of switching one or more parts of a circuit.
17. Biol. a systematic tabular classification of the significant characteristics of the members of a group of organisms to facilitate identification and comparison.
18. Archit. a keystone or boss.
19. a wedge, as for tightening a joint or splitting a stone or timber.
21. the dominant tonal value of a photograph, high key being light tonal value with minimal contrast and low key being generally dark with minimal contrast.
22. Bot. a samara.
adj. 23. chief; major: a key industry; The decision will be key.
v.t. 24. to regulate or adjust (actions, thoughts, speech, etc.) to a particular state or activity; bring into conformity.
25. to provide with a key.
26. to mark or set (a text, layout, diagram, etc.) with symbols, letters, etc., as to show where certain matter should be inserted or to indicate where more detailed information can be found.
27. to lock with a key.
28. to provide (an arch or vault) with a keystone.
29. to keyboard (data) into a computer (sometimes fol. by in).
v.i. 30. to use a key.
31. to keyboard.
32. key (in) on, to single out as important.
33. key up, to increase tension in; stimulate.
[before 900; Middle English key(e), kay(e), Old English cǣg, cǣge; c. Old Frisian kei, kai]
key′less, adj.
key2
(ki)
n., pl. keys. a reef or low island; cay.
[1690–1700; < Sp cayo, probably < Arawak]
key3
(ki)
n., pl. keys. Slang. a kilogram of marijuana or a narcotic drug.
[1965–70,
Amer.; shortening and resp. of
kilogram]
Key
(ki)
n. Francis Scott, 1780–1843, U.S. lawyer: author of The Star-Spangled Banner.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.