tube

Tube means a hollow cylinder.

(noun)

An example of a tube is manicotti pasta.

The definition of a tube is a pliable container with a screw cap at one end to keep it closed.

(noun)

An example of tube is the container that toothpaste comes in.

See tube in Webster's New World College Dictionary

noun

1. a hollow cylinder or pipe of metal, glass, rubber, etc., usually long in proportion to its diameter, used for conveying fluids, etc.
2. an instrument, part, organ, etc. resembling a tube: bronchial tubes, eustachian tubes
3. a fallopian tube: usually used in pl.
a rubber casing inflated with air and used, esp. formerly, with an outer casing to form an automotive tire
a cylindrical container made of thin, pliable metal, plastic, etc., fitted at one end with a screw cap, and used for holding pastes or semiliquids, which can be squeezed out
☆
1. electron tube
2. vacuum tube
1. a tubular tunnel for a railroad, subway, etc.
2. Brit. an underground electric railway; subway
Bot. the lower, united part of a gamopetalous corolla or a gamosepalous calyx
Elec. the tubular space bounded by the lines of electric or magnetic force passing through every point on a closed curve on the outside of a charged body
in full tube of flux or tube of force

Origin: Fr < L tubus, a pipe

transitive verb tubed, tubing

Related Forms:

See tube in American Heritage Dictionary 4

noun

a. A hollow cylinder, especially one that conveys a fluid or functions as a passage.
b. An organic structure having the shape or function of a tube; a duct: a bronchial tube.
A small flexible cylindrical container sealed at one end and having a screw cap at the other, for pigments, toothpaste, or other pastelike substances.
Music The cylindrical part of a wind instrument.
Electronics
a. An electron tube.
b. A vacuum tube.
Botany The lower, cylindrical part of a gamopetalous corolla or a gamosepalous calyx.
Chiefly British
a. An underground railroad tunnel.
b. An underground railroad system, especially the one in London, England.
A tunnel.
a. An inner tube.
b. An inflatable tube or cushion made of rubber or plastic and used for recreational riding, as behind a motor boat or down a snow-covered slope.
Informal
a. Television: What's on the tube?
b. A television set.
tubes Informal The fallopian tubes.