noun
[ U ] a state in which sth moves continuously without stopping, or appears to do so :
We're all in a state of perpetual motion in this office (= we're always moving around or changing things) .
noun
[ U ] a state in which sth moves continuously without stopping, or appears to do so :
We're all in a state of perpetual motion in this office (= we're always moving around or changing things) .
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005