Answer :
revolution is not equal to any year....it may ends in 1 day or 10 years .......so don't confuse.
it just an English word that means a process in which there is change in old system for a new one . and the definition you say is also correct ....so !
it just an English word that means a process in which there is change in old system for a new one . and the definition you say is also correct ....so !