Found 1 items, similar to up on.
English → English (WordNet) Definition: up on up on adj : 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 of(p), au courant, au fait, up on(p)]