Usage Of Trade
usage of trade: a practice or method of dealing that is regularly observed in a place, vocation, or trade and that one justifiably expects to be followed by another party to a commercial transaction compare course of dealing , course of performance NOTE: Evidence of a usage of trade may be admissible as supplementing the express terms of a disputed contract when it does not contradict them.
Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.