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English definition of “irresponsible”

irresponsible

adjective     /ˌɪr.ɪˈspɒn.sɪ.bl̩/ US  /-ˈspɑːn-/ disapproving
B2 not thinking enough or not worrying about the possible results of what you do: [+ to infinitive] It would be irresponsible to ignore these warnings .InconsiderateSelfishness irresponsibly     /-bli/ adverb It's unlike you to behave so irresponsibly.InconsiderateSelfishness irresponsibility     /ˌɪr.ɪˌspɒn.səˈbɪl.ɪ.ti/ US  /-ˌspɑːn.səˈbɪl.ə.t̬i/ noun [U] It was an act of gross irresponsibility to leave someone who wasn't properly trained in charge of the machine .InconsiderateSelfishness
(Definition of irresponsible adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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