The Law Dictionary

Your Free Online Legal Dictionary • Featuring Black’s Law Dictionary, 2nd Ed.

CONSUETUDO MERCATOR- UIN Definition & Legal Meaning

Definition & Citations:

Lat. The custom of merchants, the same with lex meroatoria. Consuetudo contra rationem intro- ducta potius usurpatio quam consuetudo appellari debet. A custom introduced against reason ought rather to be called a “usurpation” than a “custom.” Co. Litt. 113. Consuetudo debet esse certa; nam in- certa pro nulla habetur. Dav. 33. A custom should be certain; for an uncertain custom is considered null. Consuetudo est altera lex. Custom Is another law. 4 Coke, 21. Consuetudo est optimus interpret le- gnm. 2 Inst. 18. Custom is the best expounder of the laws. Consuetudo et communis assuetudo vincit legem non scriptam, si sit spe- cialis; et interpretatur legem scriptam, si lex sit generalis. Jenk. Cent. 273. Custom and common usage overcomes the unwritten law, if it be special; and interprets the written law, If the law be general. Consuetudo ex certa causa rationablli nsitata privat communem legem. A custom, grounded on a certain and reasonable cause, supersedes the common law. Litt.


This article contains general legal information but does not constitute professional legal advice for your particular situation. The Law Dictionary is not a law firm, and this page does not create an attorney-client or legal adviser relationship. If you have specific questions, please consult a qualified attorney licensed in your jurisdiction.