1. understand or be aware of something
be fully cognizant of something
To be 'cognizant of' something is to be aware of or have an understanding of something: "It seems apparent that most of our staff was cognizant of the underhand deals that were taking place here." "Please ensure all involved are cognizant of the changes to the process." This is a verb that is more likely to be used in formal or professional contexts. Similar phrases include 'be aware of' and 'be informed on'.