To make legal or lawful} to confirm or validate what was before void or unlawful; to add the sanction and authority of law to that which before was without or against law. Legalized nuisance. A structure, erection, or other thing which would constitute a nuisance at common law, but which cannot be objected to by private persons because constructed or maintained under direct and sufficient legislative authority. Such, for example, are hospitals and pesthouses maintained by cities. See Baltimore v. Fairfield Imp. Co., 87 Md. 352, 39 Atl. 1081, 40 L. R. A. 494, 67 Am. St Rep. 344.