adj, noun ·Common ·High school level

Definitions

Noun

1. 1
   Someone who is not responsible.

Adjective

1. 1
   Not responsible; exempt from legal responsibility, not to be held accountable. archaic

   "They left the crown what, in the eye and estimation of law, it had ever been, perfectly irresponsible."

2. 2
   Lacking a sense of responsibility; performed or acting as though without responsibility; negligent.

Adjective

1. 1
   showing lack of care for consequences wordnet

Synonyms

All synonyms

fecklessunaccountableunreliablefoolhardyadriftafloat

Antonyms

All antonyms

responsible

Example

More examples

"The man charged me with being irresponsible."

Etymology

From ir- + responsible.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.