n.
Pronunciation: ' näk- ˌ dau ̇ n
Function: adjective
Date: 1690
1 : having such force as to strike down or overwhelm <a bewildering assortment of knockdown arguments ― J. W. Krutch>
2 : that can easily be assembled or disassembled <a knockdown table>
3 chiefly British : extremely low : REDUCED < knockdown prices>