Pronunciation: (ir"i-spon'su-bul), [key]
1. said, done, or characterized by a lack of a sense of responsibility: His refusal to work shows him to be completely irresponsible.
2. not capable of or qualified for responsibility, as due to age, circumstances, or a mental deficiency.
3. not responsible, answerable, or accountable to higher authority: irresponsible as a monarch.
an irresponsible person.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.