Conventio Vincit Legem
Defined in 3 dictionaries — Cyclopedic (1922), Ballentine's (1916), Stimson (1881)
The Cyclopedic Law Dictionary
Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
The agreement of the parties overcomes or prevails against the law. Story, Ag. § 368; 6 Taunt. 430. See Dig. 16. 3. 1. 6.
Ballentine's Law Dictionary
James A. Ballentine · 1916
The contract controls the law. See 14 Gray (Mass.), 446.
Glossary of Technical Terms, Phrases, and Maxims of the Common Law
Frederic Jesup Stimson · 1881
I. [Express] agreement law. Conventio privatorum non potest rogare: the agreement of private persons cannot lic right.