overreaching,n.1. The act or an instance of taking unfair commercial advantage of another, esp. by fraudulent means. [Cases: Contracts  1; Sales  1(1). C.J.S. Contracts §§ 2–3, 9, 12; Sales§§ 2, 9, 29, 48.] 2. The act or an instance of defeating one’s own purpose by going too far. — overreach,vb.

[Blacks Law 8th]