Definition & Meaning of "key"

Key

NOUN

a specially shaped piece of metal used for locking or unlocking a door, starting a car, etc.

Example

The spare key was hidden under a rock near the front porch.

He turned the key in the ignition to start the car 's engine.

She inserted the key into the lock and turned it to open the door.

one of many buttons that one presses or taps to operate a computer, telephone, or cell phone

Example

Keypads on telephones and cell phones feature numeric keys for dialing phone numbers, along with additional keys for functions like call control, messaging, and navigation.

Touchscreen devices utilize virtual keys displayed on the screen, allowing users to interact by tapping or swiping to input text, execute commands, or navigate menus.

any wooden or metal part of a piano or similar instruments that make a sound when pressed

What is a "key"?

A key is a component of a musical instrument, such as a piano or wind instrument, that is pressed or activated to produce a sound. On a piano, keys are the individual levers that are pressed to strike the strings inside, creating notes. On wind instruments, keys are levers or buttons that open and close holes to change the pitch of the notes produced. The design and function of keys vary depending on the instrument, but they are essential for playing melodies and harmonies.

something crucial for explaining

pitch of the voice

a set of notes based on a particular note that form the tonal basis of a musical passage

What is "key"?

In music, the term "key" refers to the group of notes and chords that form the basis of a musical piece. A key is defined by a specific starting note, called the tonic, and includes a set of related notes that are used to create melodies and harmonies. For example, the key of C-major starts on the note C and uses a set of notes that are based on the C-major scale. The key helps to establish the overall mood and tonal center of the music, guiding how the notes and chords interact to create a cohesive sound.

Example

The guitarist improvised a solo in the key of E flat major, showcasing his versatility and skill.

The song 's melody was centered around the tonic note of the key, providing a sense of stability.

The composer chose the key of G major for the symphony, emphasizing its bright and uplifting qualities.

mechanical device used to wind another device that is driven by a spring (as a clock)

the central building block at the top of an arch or vault

a generic term for any device whose possession entitles the holder to a means of access

a list of symbols that accompanies a table, map, etc. as a reference for further explanation

a list of answers to a test

(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

a kilogram of a narcotic drug

key

ADJECTIVE

essential and highly important to a particular process, situation, or outcome