It's all the books/comics/etc. that Disney has released since buying Lucasfilm that has been deemed canonical. You can find a list of all canon content here. All the things on that list that aren't the moviesor animated series count as canon EU.
Specifically, it stands for canon expanded universe as opposed to the old expanded universe that has now been walled off behind the Legends moniker.
no subject
(Anonymous) 2017-09-24 12:11 am (UTC)(link)no subject
Specifically, it stands for canon expanded universe as opposed to the old expanded universe that has now been walled off behind the Legends moniker.