Editorial
Negligence
Definition
A tort committed where a defendant owes the claimant a duty of care, breaches it by falling below the standard of a reasonable person, and thereby causes damage that is not too remote.
In plain English: Someone had a responsibility to be careful, was not careful enough, and you were harmed as a result.
A general definition, not tied to any jurisdiction. Check the meaning in the system that governs your matter before relying on it.