Wordnet 3.0
ADJECTIVE (1)
1. 
 being up to particular standard or level especially in being up to date in knowledge; 
- Example: "kept abreast of the latest developments"- Example: "constant revision keeps the book au courant"- Example: "always au fait on the latest events"- Example: "up on the news"[syn: abreast(p), au courant, au fait, up on(p)]
WordNet (r) 3.0 (2006):
au courant
    adj 1: being up to particular standard or level especially in
           being up to date in knowledge; "kept abreast of the
           latest developments"; "constant revision keeps the book
           au courant"; "always au fait on the latest events"; "up
           on the news" [syn: abreast(p), au courant, au fait,
           up on(p)]