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Webster 1913 Edition
Irresponsible
Irˊre-spon′si-ble
,Adj.
 [Pref. 
ir- 
not + responsible
: cf. F. irresponsable
.] 1. 
Not responsible; not liable or able to answer for consequences; innocent. 
2. 
Not to be trusted; unreliable; lacking a proper sense of responsibility. 
Webster 1828 Edition
Irresponsible
IRRESPONS'IBLE
,Adj.
 Definition 2025
irresponsible
irresponsible
English
Adjective
irresponsible (comparative more irresponsible, superlative most irresponsible)
- Lacking a sense of responsibility; incapable of or not chargeable with responsibility; unable to respond to obligation; negligent.
 - Not responsible; not subject to responsibility; not to be held accountable, or called into question.
 
Translations
lacking a sense of responsibility
  | 
  | 
not responsible; not subject to responsibility
  | 
Noun
irresponsible (plural irresponsibles)
- Someone who is not responsible.
 
References
- irresponsible in The Century Dictionary, The Century Co., New York, 1911
 - irresponsible in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913