mass unit
nounUK /mæs ˈjuːnɪt/
US /mæs ˈjuːnɪt/
A mass unit is a special amount we use to measure how heavy something is.
The kilogram is a mass unit that tells us how heavy a bag of apples is.
OTHER MEANINGS
2. A standard amount used in science to compare the mass of different objects.
Scientists use the gram as a mass unit in their experiments.
3. Any named quantity, such as the kilogram or pound, that expresses how much matter an object has.
The teacher asked which mass unit we would use for a small coin.
4. A unit in a system of measurement that is based on mass rather than length or time.
In the metric system, the kilogram is the main mass unit.