up on

Adjective
  1. Being up to particular standard or level especially in being up to date in knowledge (synset 301309600)
    "kept abreast of the latest developments"; "constant revision keeps the book au courant"; "always au fait on the latest events"; "up on the news"
    similar to: informed - having much knowledge or education
    same as: abreast, au courant, au fait

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