A crucial step or requirement.
The general pitch or tone of a sentence or utterance.
A piece of wood used as a wedge.
A piece of information (e.g., a password or passphrase) used to encode or decode a message or messages.
A modification of an advertisement so as to target a particular group or demographic.
One of several small, usually square buttons on a typewriter or computer keyboard, mostly corresponding to text characters.
A scale or group of pitches constituting the basis of a musical composition.
A series of logically organized groups of discriminating information which aims to allow the user to correctly identify a taxon.
The degree of roughness, or retention ability of a surface to have applied a liquid such as paint, or glue.
One of a string of small islands.
A password restricting access to an IRC channel.
In 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.
In musical notation, a sign at the head of a staff indicating the musical key.
A value that uniquely identifies an entry in a container.
A keystone.
The last board of a floor when laid down.
The lowest note of a scale; keynote.
A wooden support for a rail on the bullhead rail system.
In musical theory, the total melodic and harmonic relations, which exist between the tones of an ideal scale, major or minor; tonality.
An indehiscent, one-seeded fruit furnished with a wing, such as the fruit of the ash and maple; a samara.
In musical instruments, one of the valve levers used to select notes, such as a lever opening a hole on a woodwind.
A guide to the correct answers of a worksheet or test.
The thirty-third card of the Lenormand deck.
A guide explaining the symbols or terminology of a map or chart; a legend.
That part of the plastering which is forced through between the laths and holds the rest in place.
In musical theory and notation, the tonality centering in a given tone, or the several tones taken collectively, of a given scale, major or minor.
A manual electrical switching device primarily used for the transmission of Morse code.
The black ink layer, especially in relation to the three color layers of cyan, magenta, and yellow. See also CMYK.
The 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.
A color to be masked or made transparent.
An object designed to open and close a lock.
In a relational database, a field used as an index into another table (not necessarily unique).
An object designed to fit between two other objects (such as a shaft and a wheel) in a mechanism and maintain their relative orientation.
To be identified as a certain taxon when using a key.
(more usually to key in) To enter (information) by typing on a keyboard or keypad.
To fasten or secure firmly; to fasten or tighten with keys or wedges.
To link (as one might do with a key or legend).
To depress (a telegraph key).
To 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).
To attune to; to set at; to pitch.
To vandalize (a car, etc.) by scratching with an implement such as a key.
To operate (the transmitter switch of a two-way radio).
To modify (an advertisement) so as to target a particular group or demographic.
To fit (pieces of a mechanical assembly) with a key to maintain the orientation between them.
To mark or indicate with a symbol indicating membership in a class.
To fit (a lock) with a key.
Important, salient.
Indispensable, supremely important.
A dilemma, a difficult decision or choice.
A state of not knowing what to decide; a state of difficulty or perplexity; a state of uncertainty, hesitation or puzzlement.