OVERTURN Meaning of OVERTURN in English v. & n.v. 1 tr. cause to fall down or over; upset. 2 tr. reverse; subvert; abolish; invalidate. 3 intr. fall down; fall over. n. a subversion, an act of upsetting. Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012