Knockdown

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" (Castle), the thirteenth episode of the third season of the TV series Castle
 * knock-down fastener
 * knock-down furniture
 * Knockdown (arcade game)', an arcade game released by Namco
 * Knockdown (G.I. Joe), a fictional character in the G.I. Joe universe
 * "Knockdown" (song), a song by Alesha Dixon
 * KnocDown, a music producer
 * Knockdown, a nautical term for a near-capsize
 * Knock-down kit, 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
 * Gene knockdown, a genetic modification technique