Definition of well up on or in in English:

(well)up on (or in)

Well informed about: he was up on the latest methods
More example sentences
  • Even officials who would presumably be up on such issues appeared fuzzy about the central questions.
  • She wanted to be be up on any news sent to them.
  • However, you two don't seem to be up on current events.
See parent entry: up

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day envenom
Pronunciation: ɪnˈvɛnəm
verb
put poison on or into; make poisonous