Clincher/ˈklɪntʃər/ Definition 1 of 3Pro Tip 1/3Debate Enders The word 'clincher' often signifies a strong point that ends debates or discussions. Her irrefutable evidence was the clincher in the debate. Pro Tip 2/3Settling Disputes 'Clincher' can imply a final piece that resolves disputes or conflicts conclusively. The signed contract was the clincher for the business deal. Pro Tip 3/3Proof Power Use 'clincher' when an argument is made indisputable by a powerful fact or evidence. His alibi was the clincher that confirmed his innocence.