aqua fortis noun3 •A corrosive liquor made of saltpeter, serving as a solvent for dissolving silver and all other metals except gold. •(dialect, old-fashioned) Any strong and potentially dangerous alcoholic drink.this man’s whiskey ain’t Red Eye, it ain’t Chain Lightnin’ either, it’s regular Agur-forty, and there isn’t a man living can stand a glass and keep his senses. — 1867 •(no longer used) Synonym of nitric acid.
