( saying ) people will be dealt with, seen, etc. strictly in the order in which they arrive :
Tickets are available on a first come, first served basis.
( saying ) people will be dealt with, seen, etc. strictly in the order in which they arrive :
Tickets are available on a first come, first served basis.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005