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Discover LudwigThe phrase "a single key" is correct and usable in written English.
It can be used when referring to one specific key, often in contexts related to security, access, or unlocking something.
Example: "To enter the secure area, you will need a single key that grants you access."
Alternatives: "one key" or "a lone key".
Exact(60)
Each stroke is mapped onto a single key.
(A single key may be involved in three or four commands).
For $100, a donor could adopt a single key on one of the console's three manuals.
He was perplexed but entertained by the idea of shipping a single key to Manhattan.
If you were looking for a single key to this diverse oeuvre, you won't find it here.
But as with any major industry, the financial failure of a single key player could undermine the profits of everyone.
There are two gaming settings – standard, in which special moves require some dextrous button-pressing, and simple, where the moves can be assigned to a single key.
It's deceptively simple, with a steady kick, a ticking snare, and a synth line spiking and falling within a single key.
At the door to her fourth-floor apartment, she took out a single key, unattached to any chain, key ring, or other keys, and opened the door.
If you struck a single key on this piano, a sharp spike would be driven into a cat's tail, causing it to yowl.
It's heavy, hypnotic and mostly restricted to a single key, indicative of demoralised community that has sunk into the poverty trap with little chance of escape.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com