tube

noun

1 long hollow pipe

ADJECTIVE

▪ fine, narrow, thin

▪ hollow

▪ flexible

▪ closed, sealed

▪ inner (= on a bicycle wheel)

▪ fluorescent (= a kind of light)

▪ cardboard, copper, glass, metal, plastic, rubber, steel, etc.

▪ cathode ray, vacuum

▪ test

▪ breathing, feeding, ventilation

▪ bronchial, capillary, Eustachian, Fallopian, neural, etc.

▪ pollen

▪ torpedo

PREPOSITION

▪ down a/the tube

▪

She poured the liquid down the tube.

▪ in a/the tube, into a/the tube

▪

I put the poster back into its tube.

▪ through a/the tube

▪

He gave the lamb its food through a tube.

▪ up a tube

2 (usually the tube) (BrE) the London Underground

ADJECTIVE

▪ London

VERB + TUBE

▪ catch, go on, take, travel by, travel on

▪

I often travel by tube

▪

I often travel on the tube

TUBE + NOUN

▪ line, network, station

▪ carriage, train

▪

I had to cram myself into a packed tube carriage.

▪ map, ticket

▪ driver, worker

▪ journey

▪

my tube journey to work

PREPOSITION

▪ by tube

▪

I go to work by tube.

▪ on the tube

▪

I bumped into him on the tube.