Nolo's Plain-English Law Dictionary

Reasonable Person

A legal standard used in negligence (personal injury) cases. The hypothetical reasonable person behaves in a way that is legally appropriate. Those who do not meet this standard -- that is, they do not behave at least as a reasonable person would -- are considered negligent and may be held liable for damages caused by their actions.
NOLO-web4:DRU1.6.12.2.20161011.41205