au courant
/ˌəʊ kʊˈrɒ̃
/adjective
1Aware of what is going on; well informed: they were au courant with the literary scene
Synonyms
up to date, up with, in touch, familiar, at home, acquainted, conversant;
abreast of, apprised of, in the know about, well informed about, knowledgeable about, well versed in, enlightened about, aware of, no stranger to;
French au fait
informal clued up about, genned up about, clued up on, well up on, plugged into, wise to, hip to
British informal switched on to
US informal down
1.1Fashionable: frocks with au courant details like ruching and asymmetrical hemlines
Origin
Mid 18th century: from French, literally 'in the (regular) course'.