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English definition of “key”

key

noun [C]
 
 
/kiː/
IT any of the set of moving parts that you press with your fingers on a computer, etc. to produce letters, numbers, or symbols: Press any key to continue.
GRAPHS & CHARTS a list of the symbols used in a map, chart, or book with explanations of what they mean: For an explanation of these symbols, see key below.
the key (to sth) the best or only way to achieve something: The key is to prioritize your work, and to keep to your schedule. Hard work is the key to success. A focus on training is often the key to unlocking potential.
→ See also Alt key, arrow key, control key, escape, hot key, scroll key, shift key
(Definition of key noun from the Cambridge Business English Dictionary © Cambridge University Press)
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