- said, done, or characterized by a lack of a sense of responsibility: His refusal to work shows him to be completely irresponsible.
- not capable of or qualified for responsibility, as due to age, circumstances, or a mental deficiency.
- not responsible, answerable, or accountable to higher authority: irresponsible as a monarch.
- an irresponsible person.
- not showing or done with due care for the consequences of one's actions or attitudes; reckless
- not capable of bearing responsibility
- not answerable to a higher authority for one's actions
