(a.) Not constitutional; not according to, or consistent with, the terms of a constitution of government; contrary to the constitution; as, an unconstitutional law, or act of an officer.

actionable against the law anarchic anarchistic anomic black-market bootleg chargeable contraband contrary to law criminal felonious flawed illegal illegitimate illicit impermissible irregular justiciable lawless nonconstitutional nonlegal nonlicit outlaw outlawed punishable triable unallowed unauthorized under-the-counter under-the-table unlawful unofficial unstatutory unwarrantable unwarranted wrongful