|
| speed [ speed ] |
noun (plural speeds) |
|
| Definition: |
| |
1. rate of movement or happening: the rate at which something moves, happens, or functions
|
2. rapidity: fast movement, progress, or operation
|
3. rate of movement irrespective of direction: rate of movement irrespective of direction. It is equal either to distance traveled divided by travel time, or to rate of change of distance with respect to time.
|
4. drugs
(
slang
)
Same as amphetamine
|
5. mechanical engineering gear ratio: a gear ratio in a motor, engine, or driving mechanism
  a ten-speed bicycle
operates at three different speeds
|
6. photog photographic film's sensitivity to light: a measure of the sensitivity of photographic film to light, expressed numerically according to any of various rating systems
|
7. success: success or prosperity
(
archaic
)
|
verb (past and past participle sped [ sped ] or speed·ed, present participle speed·ing, 3rd person present singular speeds) |
|
| Definition: |
| |
1. transitive and intransitive verb go or move quickly: to go or move quickly, or make somebody or something do this
|
2. intransitive verb drive fast: to drive fast, especially in excess of the speed limit
|
3. intransitive verb happen quickly: to pass or happen quickly or more quickly
days speeding by
|
4. intransitive verb drugs use amphetamines: to be under the influence of amphetamines
(
slang
)
|
5. transitive and intransitive verb make or be prosperous: to prosper, or cause somebody or something to prosper
(
archaic
)
|
| [ Old English spēd "success, prosperity" < Indo-European, "prosper"] |
|
at speed quickly
overtaken by a car driving at speed
|
be or get up to speed
1. to reach the maximum or desirable rate of movement or progress
2. to be or become fully informed about the latest developments
|
