capable of knocking something down; overwhelming; irresistible: a knockdown blow.
constructed in separate parts that can readily be taken apart for easy storage, shipping, etc.: a knockdown toolshed.
offered or acquired for less than the prevailing rate: first-rate goods at knockdown prices.
an act or instance of knocking down, especially by a blow.
something that fells or overwhelms.
reduction or lowering, as in price or number: The store offered a knockdown of 15 percent to its own employees.
Slang. an introduction, especially to a person: He gave me a real knockdown to the company.
Nautical. the capsizing of a small boat as a result of a strong gust of wind.
1680–90; adj., noun use of verb phrase knock down