The definition of inbound is something that moves inward. An example of inbound is the freeway that goes toward the city center. 1  traveling or going inward.  Basketball inbounds.
Mass is a measurement of how much matter is in an object. Mass is a combination of the total number of atoms, the density of the atoms, and the type of atoms in an object. How to Measure Mass.
ï· Mass: a measure of the amount of matter in an object; a fundamental property of an. object that is not affected by the forces that act on the object, such as gravity. ï· Element: a substance that cannot be separated or broken down into simpler substances by.