Oblivious

a.	1.
	1.	Promoting oblivion; causing forgetfulness. She lay in deep, oblivious slumber. - Longfellow.
	2.	Evincing oblivion; forgetful. Through are both weak in body and oblivious. - Latimer.

Adj.	1.	oblivious - (followed by `to' or `of') lacking conscious awareness of; "oblivious of the mounting pressures for political reform"; "oblivious to the risks she ran"; "not unmindful of the heavy responsibility" Synonyms: unmindful
	2.	oblivious - failing to keep in mind; "forgetful of her responsibilities"; "oblivious old age" Synonyms: forgetful

Lethean, absent, absent-minded, absentminded, absorbed, abstracted, airy, amnestic, asleep, bemused, blank, blankminded, blind to, blocked, calm, careless, castle-building, casual, cataleptic, catatonic, cold, comatose, converted, cursory, daydreaming, daydreamy, dead, dead asleep, dead to, deaf, deaf to, deep asleep, degage, detached, disregardant, disregardful, distant, doped, dormant, dreaming, dreamy, drowsing, drugged, easygoing, ecstatic, elsewhere, empty, empty-headed, engrossed, faraway, fast asleep, fatuous, flaked-out, flippant, forgetting, free and easy, half-awake, half-conscious, heedless, in a reverie, in the clouds, inane, inclined to forget, incogitant, incognizant, inconsiderate, indifferent, insensible, insensitive, insouciant, lazy, lost, lost in thought, lost to, meditative, mooning, moonraking, museful, musing, napping, narcotized, nirvanic, nodding, offhand, out, out cold, out of it, passive, pensive, perfunctory, pipe-dreaming, preoccupied, quietistic, rapt, reckless, regardless, relaxed, removed, repressed, respectless, semiconscious, sleeping, slumbering, somewhere else, sound asleep, spaced out, stargazing, stoned, strung out, suppressed, tactless, taken up, thoughtfree, thoughtless, tranquil, transported, unacquainted, unaware, unconcerned, unconscious, undiplomatic, unfamiliar, unfeeling, unheedful, unheeding, unideaed, uninformed, uninstructed, unintellectual, unknowing, unoccupied, unprepared, unready, unreasoning, unsolicitous, untactful, unthinking, unwitting, vacant, vacuous, woolgathering, wrapped in thought, zonked, zonked out