What's the "een" in Halloween?
1590s, "hole made by a burrowing insect" (in fruit, etc.), from worm (n.) + hole (n.). Astrophysics sense is attested from 1957.
A hole made by a burrowing worm.
A theoretical distortion of space-time that would link points in space through a second set of paths, some of which could be shorter than the shortest path without the wormhole. It is not known whether workholes are possible. See more at space-time.
An unauthorized way into a computer system: an unknown hacker burrowed electronically through a ''worm hole'' of the World Wide Web (late 1980s+ Computer)