■ noun ( plural ~s )
1》 Brit. a large wheeled metal basket or frame used for transporting items such as luggage or supermarket purchases.
↘a small table on wheels or castors, used especially to convey food and drink.
2》 (also ~ wheel ) a wheel attached to a pole, used for collecting current from an overhead electric wire to drive a tram.
3》 short for ~bus or ~ car .
Phrases
off one's ~ informal mad; insane.
Origin
C19: of dialect origin, perh. from troll 2 .