1. plural of tube; hollow cylindrical objects or structures
2. flexible containers for paste-like substances with removable caps
3. subway or underground railway systems
Usage: British informal

Examples

• The plumber replaced the old water tubes in the basement.
• She squeezed toothpaste from one of the tubes on the counter.
• The laboratory uses glass tubes for various experiments.
• He takes the tubes to work every morning in London.
• The artist stored paint in metal tubes.
• Copper tubes carry hot water throughout the building.
• The kids watched cartoons on the old tubes in the den.