Concurrence deloyale

A verm of the French law nearly equivalent to "unfair trade competition;" and used in relation to the infringement of rights secured by trade-marks, etc. It signifies a dishonest, perfidious, or treacherous rivalry in trade, or any manoeuvre calculated to prejudice the good will of a business or the value of the name of a property or its credit or renown with the public, to the injury of a business competitor. Simmons Medicine Co. v. Mansfield Drug Co.., 93 Tenn. 84, 23 S. W. 165.

Defined under Concurrence in Black's Law Dictionary.