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.
The mass of an object is how much matter is contained within that object. The SI unit of measure for mass is the kilogram. The word mass should be used instead of the term 'weight', which suggests the force of gravity acting upon the object. The mass of an object is how much matter is contained within that object. The SI unit of measure for mass is the kilogram.