ETYM Latin legalis, from lex, legis, law; prob. orig., that which lies or is fixed (cf. Latin lectus bed), and if so akin to Eng. lie, law: cf. French légal. Related to Lie to be prostrate, Loyal, Leal.
1. Of or relating to jurisprudence.
2. Established by or founded upon law or official or accepted rules.
3. Having legal efficacy or force; SYN. sound.
4. (Sports) Allowed by official rules.
5. Relating to or characteristic of the profession of law.

One that conforms to rules or the law