Tunnel
/ˈtʌn(ə)l/
Last Updated: January 2, 2026 at 12:30 PM
Scrabble:6 ptsWWF:10 pts6 letters
Definition of Tunnel
noun
- An underground or underwater passage.
- A passage through or under some obstacle.
- A hole in the ground made by an animal, a burrow.
- A wrapper for a protocol that cannot otherwise be used because it is unsupported, blocked, or insecure.
- A vessel with a broad mouth at one end, a pipe or tube at the other, for conveying liquor, fluids, etc., into casks, bottles, or other vessels; a funnel.
verb
- To make a tunnel through or under something; to burrow.
- To dig a tunnel.
- To transmit something through a tunnel (wrapper for insecure or unsupported protocol).
- To insert a catheter into a vein to allow long-term use.
- To undergo the quantum-mechanical phenomenon where a particle penetrates through a barrier that it classically cannot surmount.