Being up to particular standard or level especially in being up to date in knowledge:
— Constant revision keeps the book au courant.

synoniemen: abreast, au fait, up on.

Roget 490: knowing etc. v.; cognitive; acroamatic^†.    aware of, cognizant of, conscious of; acquainted with, made acquainted with; privy to, no stranger to; au fait with, au courant; in the secret; up to, alive to; behind the scenes, behind the curtain; let into; apprized of, informed of; undeceived.    proficient with, versed with, read with, forward with, strong with, at home in; conversant with, familiar with.    erudite, instructed, leaned, lettered, educated; well conned, well informed, well read, well grounded, well educated; enlightened, shrewd, savant, blue, bookish, scholastic, solid, profound, deep-read, book-learned; accomplished etc. (skillful) 698; omniscient; self-taught.    known etc. v.; ascertained, well-known, recognized, received, notorious, noted; proverbial; familiar, familiar as household words, familiar to every schoolboy; hackneyed, trite, trivial, commonplace.    cognoscible^†, cognizable.    ... meer laten zien