Function: transitive verb
Date: 15th century
: to persist or persevere in < kept up the good work> also : MAINTAIN , SUSTAIN < keep standards up >
intransitive verb
1 : to keep adequately informed or up-to-date < keep up on international affairs>
2 : to continue without interruption <rain kept up all night>
3 : to maintain contact or relations with < keep up with old friends>