Nah, the "definition of consciousness" is nine circles of philosophical bullshit where no one can agree upon the exacts.

Plenty of AIs are capable of something very much alike to "dreaming and simulating situations in your head" too. Humans really hate the idea of AIs being conscious, so surely that means dreaming can't be in any way important for determining whether something is conscious or not.

I've never heard that definition and the wikipedia page for consciousness literally has a subheading titled "problem of definition".