Meaning of SPEED in English

I. noun Etymology: Middle English spede, from Old English spēd; akin to Old High German spuot prosperity, ~, Old English spōwan to succeed, Latin spes hope, Lithuanian spėti to be in time Date: before 12th century prosperity in an undertaking ; success , 2. the act or state of moving swiftly ; swiftness , rate of motion: as, velocity 1, the magnitude of a velocity irrespective of direction, impetus , swiftness or rate of performance or action ; velocity 3a, 4. the sensitivity of a photographic film, plate, or paper expressed numerically, the light-gathering power of a lens or optical system, the time during which a camera shutter is open, a transmission gear in automotive vehicles or bicycles, someone or something that appeals to one's taste , methamphetamine , see: haste ~ster noun II. verb (sped or ~ed; ~ing) Date: before 12th century intransitive verb 1. to prosper in an undertaking, get along , fare , 2. to make haste , to go or drive at excessive or illegal ~, to move, work, or take place faster ; accelerate , transitive verb 1. to cause or help to prosper ; aid , to further the success of, 2. to cause to move quickly ; hasten , to wish God~ to, to increase the ~ of ; accelerate , to send out , ~er noun

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.