Adjective oblivious has 2 senses
  1. oblivious, unmindful - (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"
    Antonym: aware (indirect, via unaware)
  2. forgetful, oblivious - failing to keep in mind; "forgetful of her responsibilities"; "oblivious old age"
    Antonym: attentive (indirect, via inattentive)