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  1The quality in a sound of being deep, full, and reverberating. âthe resonance of his voiceâ. 2  2Physics. The reinforcement or prolongation of sound by reflection from a surface or by the synchronous vibration of a neighbouring object.