Meaning of ACCELERATION in English

 ̷ ̷ˌ ̷ ̷ ̷ ̷ˈrāshən noun

( -s )

Etymology: Latin acceleration-, acceleratio, from acceleratus + -ion-, -io -ion

1. : the act or process of accelerating

the unusual acceleration of economic activity

: state of being accelerated

2. : the time rate of change of velocity (as in speed or direction) : the vector derivative of the velocity with respect to time — see angular acceleration

3. : gradual appearance in the course of evolution of an ancestral adult character in the immature descendant — compare abbreviation

4. : advancement in mental growth or achievement beyond the average of one's age

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.