( informal ) to start to pay careful attention to what is happening, being said, etc. :
The proposal had made his clients sit up and take notice .
( informal ) to start to pay careful attention to what is happening, being said, etc. :
The proposal had made his clients sit up and take notice .
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005