UNCONSTITU'TIONAL, adjective Not agreeable to the constitution; not authorized by the constitution; contrary to the principles of the constitution. It is not unconstitutional for the king of Great Britain to declare war without the consent of parliament; but for the president of the United States to declare war, without an act of congress authorizing it, would be unconstitutional
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI