Source : Webster's Revised Unabridged Dictionary (1913)

Unaware \Un`a*ware"\, a.
   Not aware; not noticing; giving no heed; thoughtless;
   inattentive. --Swift.

Unaware \Un`a*ware"\, adv.
   Unawares. [Poetic] --Dryden.

Source : WordNet®

unaware
     adj 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" [ant: {aware(p)}]
     2: not aware or knowing; "an unwitting subject in an
        experiment" [syn: {unwitting}] [ant: {witting}]
     3: (often followed by `of') lacking knowledge or awareness;
        "incognizant of the new political situation" [syn: {incognizant}]
        [ant: {cognizant}]