What does negligence mean regarding personal injury lawsuits?

Negligence in personal injury lawsuits just simply means that someone had a duty and they failed in that duty and that caused injury to another. Typically in car accidents you see that where you get rear-ended or somehow the other driver failed to maintain his duties as a reasonable person would while driving his car. You can also have duties owed to you if you’ve fallen or injured at a business and you would have negligence there if you can prove that the owner of the business failed to maintain its premises in a reasonably safe condition.