noun
[ usually sing. ] an amount that you allow when you calculate sth, for the possibility that a number is not completely accurate :
The survey has a margin of error of 2.5%.
noun
[ usually sing. ] an amount that you allow when you calculate sth, for the possibility that a number is not completely accurate :
The survey has a margin of error of 2.5%.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005