unit of mass
nounUK /ˌjuːnɪt əv ˈmæs/
US /ˌjuːnɪt əv ˈmæs/
A unit of mass is a way we measure how heavy something is.
The kilogram is a unit of mass used in many countries.
RELATED WORDS
OTHER MEANINGS
2. A standard amount used in science to compare how much matter an object has.
Scientists use the gram as a unit of mass in the lab.
3. A fixed quantity agreed on by people for measuring things.
The metric system has a special unit of mass for every size.
4. A basic building block in a system of measurement.
The kilogram is the base unit of mass in the metric system.