legal (Adjective) — Established by or founded upon law or official or accepted rules.
legal (Adjective) — Of or relating to jurisprudence. ex. "legal loophole"
legal (Adjective) — Having legal efficacy or force. ex. "a legal title to the property"
legal (Adjective) — Relating to or characteristic of the profession of law. ex. "the legal profession"
legal (Adjective) — (sport) allowed by official rules. ex. "a legal pass receiver"