入定 Traditional form: 入定 Pinyin (reading): rùdìng Definitions: (Buddhism) to enter a meditative state Characters: 入 - to enter, to come in; to join 定 - to decide, to fix, to settle; to order; definite, fixed, sure Traditional characters: 入 - to enter, to come in; to join 定 - to decide, to fix, to settle; to order; definite, fixed, sure