keep (someone) posted

:  to retain in one's possession or power

:  to refrain from granting, giving, or allowing

:  to have in control

:  the means or provisions by which one is kept

:  one that keeps or protects: such as

:  fortress, castle

:  some person :  somebody

:  a piece (as of timber or metal) fixed firmly in an upright position especially as a stay or support :  pillar, column

:  a pole or stake set up to mark or indicate something

:  a pole that marks the starting or finishing point of a horse race

:  to publish, announce, or advertise by or as if by use of a placard

:  to denounce by public notice

:  to enter on a public listing

:  courier

:  one of a series of stations for keeping horses for relays

:  the distance between any two such consecutive stations :  stage

:  to travel with post-horses

:  to ride or travel with haste :  hurry

:  to rise from the saddle and return to it in rhythm with a horse's trot

:  with post-horses :  express

:  the place at which a soldier is stationed

:  a sentry's beat or station

:  a station or task to which one is assigned

:  to station in a given place

:  to carry ceremoniously to a position

:  to assign to a unit, position, or location (as in the military or civil service)