Search Result for "irresponsible": 
Wordnet 3.0

ADJECTIVE (1)

1. showing lack of care for consequences;
- Example: "behaved like an irresponsible idiot"
- Example: "hasty and irresponsible action"



The Collaborative International Dictionary of English v.0.48:

Irresponsible \Ir`re*spon"si*ble\, a. [Pref. ir- not +
   responsible: cf. F. irresponsable.]
   1. Not responsible; not liable or able to answer for
      consequences; innocent.
      [1913 Webster]

   2. Not to be trusted; unreliable; lacking a proper sense of
      responsibility.
      [1913 Webster]


WordNet (r) 3.0 (2006):

irresponsible
    adj 1: showing lack of care for consequences; "behaved like an
           irresponsible idiot"; "hasty and irresponsible action"
           [ant: responsible]