| noun | conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases |
| noun | electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope |
| noun | a hollow cylindrical shape |
| noun | (anatomy) any hollow cylindrical body structure |
| noun | 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'” |
| verb | provide with a tube or insert a tube into |
| verb | convey in a tube “inside Paris, they used to tube mail” |
| verb | ride or float on an inflated tube “We tubed down the river on a hot summer day” |
| verb | place or enclose in a tube |
| tubular | adjective | constituting a tube; having hollow tubes (as for the passage of fluids) |
| tube | verb | place or enclose in a tube |
| tubal | adjective | of or relating to occurring in a tube such as e.g. the Fallopian tube or Eustachian tube |
| tube | noun | (anatomy) any hollow cylindrical body structure |
| tubing | noun | conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases |