out–of–date 
/ˌaʊtəvˈdeɪt/ adjective
/ˌaʊtəvˈdeɪt/ adjective [more out–of–date; most out–of–date] : no longer useful or acceptable : not modern or current
▪ out-of-date [=outdated] ideas ▪ an out-of-date history book
▪ out-of-date [=outdated] ideas ▪ an out-of-date history book
