The Clue
Subway tunnel (4 letter answer)
The Answer
TUBE
Tags
Notes
The answer TUBE is common and appears about once every 300 puzzles.
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Definition
TUBE as a noun:
1. (tube, tubing) = conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases
2. (tube, vacuum tube, thermionic vacuum tube, thermionic tube, electron tube, thermionic valve) = electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
3. (pipe, tube) = a hollow cylindrical shape
4. (tube, tube-shaped structure) = (anatomy) any hollow cylindrical body structure
5. (metro, tube, underground, subway system, subway) = an electric railway operating below the surface of the ground (usually in a city); "in Paris the subway system is called the `metro' and in London it is called the `tube' or the `underground'"
TUBE as a verb:
1. provide with a tube or insert a tube into
2. convey in a tube; "inside Paris, they used to tube mail"
3. ride or float on an inflated tube; "We tubed down the river on a hot summer day"
4. place or enclose in a tube