time capsule noun
: a container that is filled with things (such as newspapers or clothing) from the present time and that is meant to be opened by people at some time in the future
: a container holding historical records or objects representative of current culture that is deposited (as in a cornerstone) for preservation until discovery by some future age
: something resembling a time capsule <sunken vessels are archaeological time capsules — Philip Trupp>
First Known Use of TIME CAPSULE
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