1. (often followed by `of') not aware; "seemed unaware of the scrutiny"; "unaware of the danger they were in"; "unaware of the newborn hope"; "the most unaware person I've known"
(similar) oblivious(p), unmindful(p)
(attribute) awareness, consciousness, cognizance, cognisance, knowingness
2. not aware or knowing; "an unwitting subject in an experiment"
3. (often followed by `of') lacking knowledge or awareness; "incognizant of the new political situation"