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Definition tunnel

Etymology

From Middle French tonnelle (“net”) or tonel (“cask”), diminutive of Old French tonne (“cask”), a word of uncertain origin and affiliation. Related to Old English tunne (“tun; cask; barrel”). More at tun.

Noun

tunnel (plural tunnels)

1. An underground or underwater passage.
2. A passage through or under some obstacle.
3. A hole in the ground made by an animal, a burrow.
4. (computing, networking) A wrapper for a protocol that cannot otherwise be used because it is unsupported, blocked, or insecure.
5. 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.
6. The opening of a chimney for the passage of smoke; a flue.
7. (mining) A level passage driven across the measures, or at right angles to veins which it is desired to reach; distinguished from the drift, or gangway, which is led along the vein when reached by the tunnel.

Verb

tunnel (third-person singular simple present tunnels, present participle (UK) tunnelling or (US) tunneling, simple past and past participle (UK) tunnelled or (US) tunneled)

1. (transitive) To make a tunnel through or under something; to burrow.
2. (intransitive) To dig a tunnel.
3. (computing, networking) To transmit something through a tunnel (wrapper for insecure or unsupported protocol).
4. (transitive, medicine) To insert a catheter into a vein to allow long-term use.
5. (physics) To undergo the quantum-mechanical phenomenon where a particle penetrates through a barrier that it classically cannot surmount.

Results 469 Words with the letters TUNNEL

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