comparative negligence (law) negligence allocated between the plaintiff and the defendant with a corresponding reduction in damages paid to the plaintiff
concurrent negligence (law) negligence of two of more persons acting independently; the plaintiff may sue both together or separately
contributory negligence (law) behavior by the plaintiff that contributes to the harm resulting from the defendant's negligence; "in common law any degree of contributory negligence would bar the plaintiff from collecting damages"
criminal negligence,
culpable negligence (law) recklessly acting without reasonable caution and putting another person at risk of injury or death (or failing to do something with the same consequences)
neglect -
fail to do something; leave something undone; "She failed to notice that her child was no longer in his crib"; "The secretary failed to call the customer and the company lost the account"