A cart, usually a barrel or tank on wheels, carrying water; specifically one used to water the streets by sprinkling water from small holes as it goes along.
Origin
Late Middle English. From water + cart.
Definition of water cart in US English:
water cart
nounˈwɔːtə kɑːt
historical
A cart, usually a barrel or tank on wheels, carrying water; specifically one used to water the streets by sprinkling water from small holes as it goes along.