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IELTS BNC: 1267 COCA: 1093

key

1 of 5

noun (1)

ˈkē How to pronounce key (audio)
1
a
: a usually metal instrument by which the bolt of a lock is turned
b
: any of various devices having the form or function of such a key
a key for winding a clock
2
a
: a means of gaining or preventing entrance, possession, or control
b
: an instrumental or deciding factor
the key to her success
3
a
: something that gives an explanation or identification or provides a solution
the key to a riddle
b
: a list of words or phrases giving an explanation of symbols or abbreviations
a pronunciation key in a dictionary
c
: an aid to interpretation or identification : clue
a key to understanding their motivation
d
: an arrangement of the salient characters of a group of plants or animals or of taxa designed to facilitate identification
e
: a map legend
4
a
: a part to be depressed by a finger that serves as one unit of a keyboard
also : a representation of such a key (such as a space delineated on a touch screen)
Tiny keys on your iPhone's screen can be difficult to hit accurately. Cherlynn Low
b
: one of the levers of a keyboard musical instrument that actuates the mechanism and produces the tones
c
: a lever that controls a vent in the side of a woodwind instrument or a valve in a brass instrument
5
: a system of tones and harmonies generated from a hierarchical scale of seven tones based on a tonic
the key of G major
6
a
: characteristic style or tone
b
: the tone or pitch of a voice
c
: the predominant tone of a photograph with respect to its lightness or darkness
7
: a decoration or charm resembling a key
8
: a small switch for opening or closing an electric circuit
a telegraph key
9
: the set of instructions governing the encipherment and decipherment of messages
an encryption key
10
: a free-throw area in basketball : free throw lane
a jump shot from the top of the key
11
a(1)
: cotter pin
(2)
: cotter
b
: a keystone in an arch
c
: a small piece of wood or metal used as a wedge or for preventing motion between parts
12
: samara
keyed
ˈkēd How to pronounce key (audio)
adjective
keyless
ˈkē-ləs How to pronounce key (audio)
adjective

key

2 of 5

adjective

: extremely or crucially important
key issues
a key moment in the game
a key member of the staff

key

3 of 5

verb

keyed; keying; keys

transitive verb

1
: to lock or secure with or as if with a key : fasten: such as
a
: to secure (something, as a pulley on a shaft) by a key
b
: to finish off (an arch) by inserting a keystone
2
: to regulate the musical pitch of
key the strings
3
: to bring into harmony or conformity : make appropriate : attune
remarks keyed to a situation
4
: to identify (a biological specimen) by a key (see key entry 1 sense 3d)
5
: to provide with identifying or explanatory cross-references
instructions keyed to accompanying drawings John Gartner
6
: to make nervous, tense, or excited
—usually used with up
was too keyed up to sleep
7
: to enter or input (text or data) by using a keyboard
keying changes to a manuscript
—often used with in or into
key in a passwordinformation being keyed into a database
8
: to be essential to : play the most important part in
defense keyed the victory
9
: to vandalize by scratching with a key
someone keyed my car door

intransitive verb

1
: to use a key
2
: to observe the position or movement of an opposing player in football in order to anticipate the play
—usually used with on
The middle linebacker was keying on the halfback.
3
: to operate a machine by means of a keyboard : keyboard

key

4 of 5

noun (2)

: a low island or reef
specifically : any of the coral islets off the southern coast of Florida
the Florida Keys

key

5 of 5

noun (3)

slang
: a kilogram especially of marijuana or heroin

Synonyms

Example Sentences

Word History

Phrases Containing key

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