1. to calm; to settle; to bring under control
E.g.: 安定 (stability), 平定 (pacification)
2. to settle down; to be fixed; to be stationary
E.g.: 定着 (taking root), 固定 (fixation), 一定 (constant)
3. to decide; to establish; to determine; to be fixed
E.g.: 定員 (fixed number of people), 定期 (periodic, regular), 確定 (final decision)
4. rule; definition; established standard
E.g.: 定義 (definition), 規定 (regulation), 定理 (theorem)
5. meditative concentration in Buddhism (a state free of distracting thoughts)
E.g.: 禅定 (Zen meditation), 入定 (entering deep meditation)
6. surely; certainly
E.g.: 必定 (inevitably; certainly)
