litres
n. plural-only A2 Elementary UK //lˈiːtəz// litres
n. a unit for measuring how much liquid is in a container. One litre is about the same as four large glasses of water.
n. a metric unit of capacity equal to one cubic decimetre. Used primarily for measuring liquid volumes in scientific and everyday contexts.
I need to buy two litres of milk.
The car's fuel tank holds sixty litres of petrol, which is enough for a long road trip.
Environmental regulations now require industrial plants to report any chemical discharge exceeding five hundred litres into local waterways to prevent ecological damage.
Usage
This is the British English spelling; the American spelling is 'liters'. While technically a unit of measure, it is often used in the plural to describe a specific quantity of liquid.