Keychain meaning

kēchān
Frequency:
A small chain or strap for holding keys, a fob, etc.
noun
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(1) The password management system in the Mac. Introduced in Mac OS 8.6 to keep track of logins for multiple email accounts, the Keychain was later enhanced to include passwords for networks, applications and the Internet, as well as for encryption keys and digital certificates.
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A chain or ring to which a key may be attached.
noun
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An ornamental piece holding such a chain or ring.
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Origin of keychain