All Definitions for Key
Below are all the dictionary definitions of key:
1An object designed to open and close a lock.
2An object designed to fit between two other objects (such as a shaft and a wheel) in a mechanism and maintain their relative orientation.
3A crucial step or requirement.
4A small guide explaining symbols or terminology, especially the legend on a map or chart.
5A guide to the correct answers of a worksheet or test.
6One of several small, usually square buttons on a typewriter or computer keyboard, mostly corresponding to text characters.
7In musical instruments, one of the valve levers used to select notes, such as a lever opening a hole on a woodwind.
8In instruments with a keyboard such as an organ or piano, one of the levers, or especially the exposed front end of it, which are depressed to cause a particular sound or note to be produced.
9A scale or group of pitches constituting the basis of a musical composition.
10The lowest note of a scale
11Keynote.
12In musical theory, the total melodic and harmonic relations, which exist between the tones of an ideal scale, major or minor
13Tonality.
14In musical theory and notation, the tonality centering in a given tone, or the several tones taken collectively, of a given scale, major or minor.
15In musical notation, a sign at the head of a staff indicating the musical key.
16The general pitch or tone of a sentence or utterance.
17A modification of an advertisement so as to target a particular group or demographic.
18An indehiscent, one-seeded fruit furnished with a wing, such as the fruit of the ash and maple
19A samara.
20A piece of information (e.g., a password or passphrase) used to encode or decode a message or messages.
21A password restricting access to an IRC channel.
22In a relational database, a field used as an index into another table (not necessarily unique).
23A value that uniquely identifies an entry in a container.
24Any of various tools comparable to a wrench (spanner) or driver, or, in some cases, also called a wrench or driver.
25A series of logically organized groups of discriminating information which aims to allow the user to correctly identify a taxon.
26A piece of wood used as a wedge.
27The last board of a floor when laid down.
28A keystone.
29That part of the plastering which is forced through between the laths and holds the rest in place.
30A wooden wedge, driven sideways between a bullhead rail and a cast-iron chair, to keep the rail securely in position.
31The degree of roughness, or retention ability of a surface to have applied a liquid such as paint, or glue.
32The thirty-third card of the Lenormand deck.
33The black ink layer, especially in relation to the three color layers of cyan, magenta, and yellow. See also CMYK.
34A color to be masked or made transparent.
35The free-throw lane together with the circle surrounding the free-throw line, the free-throw lane having formerly been narrower, giving the area the shape of a skeleton key hole.
36A key position player (a tall forward or defender).
37Indispensable, supremely important.
38Important, salient.
39To fit (a lock) with a key.
40To fit (pieces of a mechanical assembly) with a key to maintain the orientation between them.
41To mark or indicate with a symbol indicating membership in a class.
42To depress (a telegraph key).
43To operate (the transmitter switch of a two-way radio).
44(more usually to key in) To enter (information) by typing on a keyboard or keypad.
45To vandalize (a car, etc.) by scratching with an implement such as a key.
46To link (as one might do with a key or legend).
47To be identified as a certain taxon when using a key.
48To modify (an advertisement) so as to target a particular group or demographic.
49To attune to
50To set at
51To pitch.
52To fasten or secure firmly
53To fasten or tighten with keys or wedges.
54To prepare for plastering by adding the key (that part of the plastering which is forced through between the laths and holds the rest in place).
55To provide an arch with a keystone.
56One of a string of small islands.
57A kilogram, especially of a recreational drug.
58A manual electrical switching device primarily used for the transmission of Morse code.
59A surname.
60Alternative form of quay. [(nautical) A stone or concrete structure on navigable water used for loading and unloading vessels
61A wharf.]
62Clipping of chromakey. [(transitive) To modify an image in this way.]
About synonyms for key
Finding the right synonym for key helps writers avoid repetition and add precision to their work. Defined as "An object designed to open and close a lock.", key has 3 alternatives that can fit different contexts and tones.
Each synonym carries a slightly different shade of meaning. Cay is the most direct replacement in most situations. Tonality works well in formal or professional contexts. Paint is often preferred when the context calls for a more specific or nuanced expression.
When choosing a synonym, consider the connotation, formality level, and audience. Some alternatives work better in casual conversation while others shine in academic or professional writing. For example, using a more formal synonym in a business email can elevate your tone, while a casual synonym might feel more natural in creative writing or dialogue.
It is also worth noting that not all synonyms are perfectly interchangeable. The context of your sentence, the surrounding words, and the intended emotional impact all play a role in selecting the best alternative. The list above provides the most common and useful replacements for key, but always read your sentence aloud to ensure the chosen word flows naturally.