鑑 (readings: かん, かんが, かがみ; Japanese kanji) means “Specimen / Take Warning From / Learn From”. It is a Jōyō kanji taught in Japanese secondary school (junior & senior high) — the 高手 · Master tier beyond the grade 1–6 Kyōiku set, and appears in words such as 鑑定 (appraisal).
What does 鑑 mean?