noun
appraiser; judge; expert evaluator
A person who professionally examines and gives an expert opinion on the value, authenticity, or quality of something, often in legal, artistic, or commercial contexts.
裁判所は鑑定人に筆跡の真偽を判断させた。
The court had an expert appraiser determine the authenticity of the handwriting.
美術品の鑑定人になるには長年の経験が必要だ。
Becoming an art appraiser requires many years of experience.
審判員 is a referee or umpire in sports; 鑑定人 is an expert appraiser in legal, artistic, or commercial matters.
Compound of 鑑定 (appraisal, expert judgment) and 人 (person).