if sb/sth is on your mind , you are thinking and worrying about them / it a lot :
You've been on my mind all day.
Don't bother your father tonight—he's got a lot on his mind .
if sb/sth is on your mind , you are thinking and worrying about them / it a lot :
You've been on my mind all day.
Don't bother your father tonight—he's got a lot on his mind .
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005