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.
mass noun. 1  1Geology. A hard siliceous or calcareous deposit precipitated from mineral springs. 2  2Solid material which has been sintered, especially a mixture of iron ore and other materials prepared for smelting. âtypical blast-furnace burdens are 80% sinter, 20% oreâ.