SPEED
—none. 1 rapidity of movement. 2 rate of progress or motion. 3 gear appropriate to a range of speeds of a bicycle. 4 photog. A sensitivity of film to light. B light-gathering power of a lens. C duration of an exposure. 5 slang amphetamine drug. 6 archaic success, prosperity. —verb. (past and past part. Sped) 1 go or send quickly. 2 (past and past part. Speeded) travel at an illegal or dangerous speed. 3 archaic be or make prosperous or successful. ? at speed moving quickly. Speed up move or work faster. ? speeder none. [old english]