(also old-fashioned (in) Indian file )
(in) one line, one behind the other :
They made their way in single file along the cliff path.
(also old-fashioned (in) Indian file )
(in) one line, one behind the other :
They made their way in single file along the cliff path.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005