| knock something down knock (something) down 1. to show that an idea or opinion is completely wrong. He knocked down my business plan, saying I couldn't raise the money to do it. Every time I make a suggestion, you knock it down. 2. to reduce the price of something or the amount you want for something. He usually charges $50, but he knocked it down to $40. He wanted $300 for the ring, but we got him to knock down the price. Etymology: based on the literal meaning of knock something down (= to cause a structure to fall) |