Meanings
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1
noun
a complete product that is ready to be deployed immediately, without further customization
The new software package is a turnkey, so it only took a short time to install.
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2
adj
involving a complete product that is ready to be deployed immediately, without further customization
We don't have the resources to build up a custom system, so we went with a turnkey solution.
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3
noun
someone who guards prisoners
One prisoner escaped by bribing the turnkey.
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4
adj
Ready to use without further assembly or test; supplied in a state that is ready to turn on and operate (typically refers to an assembly that is outsourced for manufacture).
They wanted a turnkey solution for the entire system, but we could only provide the enclosure.
Etymology
From turn + key.