1.
pretending to be sb else in order to do sth secretly :
a police officer working under cover
2.
under a structure that gives protection from the weather
1.
pretending to be sb else in order to do sth secretly :
a police officer working under cover
2.
under a structure that gives protection from the weather
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005