[noun] [U]Revolution is circular movement.The revolution of the Earth (UK) round/(US and ANZ) around the sun was proposed by Copernicus.See also revolution.A revolution is also one complete circular movement.The moon makes one revolution of/around the Earth in approximately 29½ days.The speed of an engine can be measured in revolutions per minute ( rpm).
REVOLUTION
Meaning of REVOLUTION in English
Cambridge English vocab. Кембриджский английский словарь. 2012