time capsule

noun

1. a receptacle containing documents or objects typical of the current period, placed in the earth or in a cornerstone for discovery in the future.

time capsule

noun

1. a container holding articles, documents, etc, representative of the current age, buried in the earth or in the foundations of a new building for discovery in the future

Word History and Origins

Origin of time capsule¹

First recorded in 1935–40