abreast_of
1. [ adjective ] being up to particular standard or level especially in being up to date in knowledge
Synonyms: au_fait up_on au_courant
Examples:

"kept abreast of the latest developments" "constant revision keeps the book au courant" "always au fait on the latest events" "up on the news"

Related terms: informed
Similar spelling:   abreast
  abreact