約定俗成 Save Sign in to save words Simplified: 约定俗成 On the HSK 7-9 vocabulary list, at CEFR level C2. yuēdìngsúchéng ㄩㄝ ㄉㄧㄥˋ ㄙㄨˊ ㄔㄥˊ established by popular usage (idiom) common usage agreement customary convention Character by character 約(yuē)make an appointment 定(dìng)fix 俗(sú)custom 成(chéng)succeed A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0 国际中文教育中文水平等级标准, 中华人民共和国教育部, MIT