Definition of "keychain" []

• A chain or ring to which a key may be attached (noun)
• An ornamental piece holding such a chain or ring. (noun)

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• "While tons of items fit into this category, one that caught my eye is the Piranha from PocketToolX, which specializes in what I call keychain multitools."
• "The advantage to this type of keychain is that it is very easy to quickly add and remove items from the ring"
• "The part that really made me laugh was the fact that they called a keychain made out of a spent .50 shell casing that had been drilled and rendered useless "ammunition.""