noun:

• law (esp. ancient East Asian criminal code); regulation
• vinaya (rules for the monastic community) - Buddhism term
• Ritsu (school of Buddhism) - abbreviation ➜ 律宗
• lushi (style of Chinese poem) - abbreviation ➜ 律詩
• (musical) pitch - also りち
• six odd-numbered notes of the ancient chromatic scale ➜ 十二律・呂
• Japanese seven-tone gagaku scale, similar to Dorian mode (corresponding to: re, mi, fa, so, la, ti, do) - abbreviation ➜ 律旋

noun / suffix noun / counter:

• (in traditional Eastern music) step (corresponding to a Western semitone)