|Origin:||Latin, present participle of negligere; NEGLECT1|
not taking enough care over something that you are responsible for, with the result that serious mistakes are made [= irresponsible; ≠ responsible]
negligent in (doing) something
The report stated that Dr Brady had been negligent in not giving the patient a full examination.
Mr Brown was found guilty of negligent driving.
a negligent manner or way of dressing is careless, but in a pleasantly relaxed way:
He gave a negligent shrug.