D defs.my
Entry 2 senses Webster, 1913

Irresponsibility

/ĭrˌ-əs-pänˌ-səb-ĭl'-ət-ē/ · Ir·re·spon·si·bil·i·ty · IPA /ˌɪrəspˌɑnsəbˈɪlətiː/
01 n. Lack of, or freedom from, responsibility or accountability.
  1. 1.
    Lack of, or freedom from, responsibility or accountability.
  2. 2.
    A trait causing one to act without a proper sense of responsibility; acting without giving proper weight to one's responsibilities.