Pronunciation: (nok'doun"),[key] —adj. 1. capable of knocking something down; overwhelming; irresistible: a knockdown blow. 2. constructed in separate parts that can readily be taken apart for easy storage, shipping, etc.: a knockdown toolshed. 3. offered or acquired for less than the prevailing rate: first-rate goods at knockdown prices.
—n. 1. a knockdown object.
2. an act or instance of knocking down, esp. by a blow.
3. something that fells or overwhelms.
4. reduction or lowering, as in price or number: The store offered a knockdown of 15 percent to its own employees. 5. Slang.an introduction, esp. to a person: He gave me a real knockdown to the company. 6. Naut.the capsizing of a small boat as a result of a strong gust of wind.