SynonymDefinitionAntonym.com - English Synonym Dictionary

Conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases

An electric railway operating below the surface of the ground (usually in a city)

Electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope

(anatomy) any hollow cylindrical body structure

A hollow cylindrical shape

Place or enclose in a tube

Convey in a tube

Ride or float on an inflated tube

Provide with a tube or insert a tube into