安定 Traditional form: 安定 Pinyin (reading): āndìng Definitions: stable; calm; settled to stabilize Valium; diazepam Characters: 安 - peaceful, tranquil, quiet 定 - to decide, to fix, to settle; to order; definite, fixed, sure Traditional characters: 安 - peaceful, tranquil, quiet 定 - to decide, to fix, to settle; to order; definite, fixed, sure