1 Many instances of performance-based design are approved for their adherence to safety principles. 2  Ceremony implies honor, and honor implies an adherence to traditions. Many instances of performance-based design are approved for their adherence to safety principles. 2  Ceremony implies honor, and honor implies an adherence to traditions.
Acceleration is a vector quantity that is defined as the rate at which an object changes its velocity. An object is accelerating if it is changing its velocity. Sports announcers will occasionally say that a person is accelerating if he/she is moving fast. Yet acceleration has nothing to do with going fast.
Princeton's WordNet(5.00 / 1 vote)Rate this definition: 1  acceleration(noun) an increase in rate of change. modern science caused an acceleration of cultural change. 2  acceleration, quickening, speedup(noun) the act of accelerating; increasing the speed. 3  acceleration(noun) (physics) a rate of increase of velocity.