Knockdown or knock-down may refer to:
* Knockdown, a situation in full-contact combat sports where a fighter is down or vulnerable, often
preliminary to a knockout
* Knockdown,
a nautical term for a near-capsize
*
Knockdown (arcade game)', an arcade game released by Namco
*
"Knockdown" (Castle), the thirteenth episode of the third season of the TV series ''Castle''
*
Knockdown (G.I. Joe), a fictional character in the G.I. Joe universe
*
"Knockdown" (song), a song by Alesha Dixon
*
Knockdown, Gloucestershire, a hamlet near
Sherston, Wiltshire
Sherston is a village and Civil parishes in England, civil parish about west of Malmesbury in Wiltshire, England. The parish is bounded to the north by the county boundary with Gloucestershire, and to the southeast by the Fosse Way, a Roman ro ...
, United Kingdom
*
Gene knockdown Gene knockdown is an experimental technique by which the expression of one or more of an organism's genes is reduced. The reduction can occur either through genetic modification or by treatment with a reagent such as a short DNA or RNA oligonucleot ...
, a genetic modification technique
*
knock-down fastener
*
knock-down furniture
Ready-to-assemble furniture (RTA), also known as knock-down furniture (KD), flat-pack furniture, or kit furniture, is a form of furniture that requires customer assembly. The separate components are packed for sale in cartons containing assembl ...
*
Knock-down kit
A knock-down kit (also knockdown kit, knocked-down kit, or simply knockdown or KD) is a collection of parts required to assemble a product. The parts are typically manufactured in one country or region, and then exported to another country or r ...
, a complete kit needed to assemble a vehicle
*
Knockdown resistance, genetic resistance to pyrethroid insecticides in many insect species
*
Knockdown texture, a drywall finishing style
*
KnocDown, a music producer
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