noun
a window that consists of two separate parts, one above the other that you open by sliding one of the parts up or down
—picture at house
noun
a window that consists of two separate parts, one above the other that you open by sliding one of the parts up or down
—picture at house
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005