revolution
"The priest addressed the congregation as Rev. Miller before leading the service."
Abbreviation of reverend.
In plain English: A rev is the number of times an engine spins around in one minute.
"The engine roared to life when he stepped on the revs."
To increase the speed of a motor, or to operate at a higher speed.
"The driver pressed the gas pedal to rev the engine before shifting into first gear."
In plain English: To rev means to make an engine run faster by turning its wheels quickly.
"He revved his engine before shifting into gear."
Usage: Use this verb specifically when increasing the rotational speed of an engine or machine rather than general movement. It is often paired with engines in automotive contexts but can apply to any mechanical device requiring higher RPMs.
Alternative form of Rev.
"The car's manual warns that rev is an acceptable alternative spelling for the brand name in casual conversation."
The word "rev" is simply an abbreviation for the words "revolutions per minute." It entered common usage as a shorthand way to describe engine speed.