A sign shows this cars speed.
- Speed is a way of measuring how quickly something is moving or being done, or something moving fast.
- An example of speed is a car being driven 45 miles per hour.
- An example of speed is someone cleaning a room in 10 minutes.
- An example of speed is how quickly a jaguar runs.
- Speed is a slang term for the street drug methamphetamine.
An example of speed is a drug that increases energy, heart rate and makes it very difficult to eat or sleep.
- Speed is defined as to help someone or something along, or move too quickly.
- An example of speed is a restaurant hostess putting regular customers at the top of a table waiting list.
- An example of speed is driving 80 mph in a 50 mph zone.
- Archaic luck; success; prosperity: to wish someone good speed
- the act or state of moving rapidly; swiftness; quick motion
- the rate of movement or motion; velocity (sense )
- the magnitude of a velocity (sense )
- the rate or rapidity of any action: reading speed
- a gear or arrangement of gears for the drive of an engine or bicycle: a truck with five forward speeds
- Informal one's kind or level of taste, capability, etc.
- Slang any of various amphetamine compounds, esp. methedrine
- the sensitivity of film to light, expressed in various numerical scales
- the widest effective aperture of a camera lens
- the length of time the shutter is opened for an exposure
Origin of speedMiddle English sped from Old English spæd, wealth, power, success, akin to spowan, to prosper, succeed from Indo-European base an unverified form sp?i-, to flourish, expand from source space, spare
of or having to do with speed
intransitive verbsped or speed′ed, speed′ing
- to move rapidly, esp. more rapidly than is safe or allowed by law
- to get along; fare
- to have fortune, good or bad
- to have good fortune; prosper; succeed
- to help (a project) to succeed; aid; promote
- to wish Godspeed to: to speed the parting guest
- to send, convey, or cause to move, go, etc. swiftly: to speed a letter on its way
- to cause or design (a machine, etc.) to operate at a certain speed or speeds
- Archaic to cause to succeed or prosper
Chiefly Brit. quickly; rapidly
to increase in speed; go or make go faster; accelerate
up to speed
- working or operating at full speed, maximum efficiency, etc.
- Informal fully informed or having enough information
- Physics The rate or a measure of the rate of motion, especially:a. Distance traveled divided by the time of travel.b. The limit of this quotient as the time of travel becomes vanishingly small; the first derivative of distance with respect to time.c. The magnitude of a velocity.
- Swiftness of action: He wrote the first chapter with great speed.
- a. The act of moving rapidly: finished the race in a burst of speed.b. The state of being in rapid motion; rapidity: The river's speed made a rescue difficult.
- A transmission gear or set of gears in a motor vehicle: What speed is the car in now?
- a. A numerical expression of the sensitivity of a photographic film, plate, or paper to light.b. The capacity of a lens to accumulate light at an appropriate aperture.c. The length of time required or permitted for a camera shutter to open and admit light.
- Slang A stimulant drug, especially amphetamine or methamphetamine.
- Slang One that suits or appeals to a person's inclinations, skills, or character: Living in a large city is not my speed.
- Archaic Prosperity; luck.
verbsped, or speed·ed speed·ing, speeds
- a. To go, move, or proceed quickly: sped to the rescue.b. To drive at a speed exceeding a legal limit: was speeding on the freeway.
- To pass quickly: The days sped by. The months have sped along.
- To move, work, or happen at a faster rate; accelerate: His pulse speeded up.
- Slang To be under the influence of a stimulant drug.
- Archaic a. To prove successful; prosper.b. To get along in a specified manner; fare.
- To cause to move or proceed quickly; hasten: no wind to speed the boat.
- To increase the speed or rate of; accelerate. Often used with up: speed up a car; sped up production.
- To further, promote, or expedite (a legal action, for example).
- Archaic To help to succeed or prosper; aid.
Origin of speedMiddle English spede from Old English spēd success, swiftness ; see spē- in Indo-European roots.
speed hurry hasten quicken accelerate precipitate
These verbs mean to proceed or cause to proceed rapidly or more rapidly. Speed refers to swift motion or action: The train sped through the countryside. Postal workers labored overtime to speed delivery of the holiday mail. Hurry implies a markedly faster rate than usual, often with concomitant confusion or commotion: Hurry, or you'll miss the plane! Don't let anyone hurry you into making a decision. Hasten suggests urgency and often eager or rash swiftness: My doctor hastened to reassure me that the tests were negative. His off-color jokes only hastened his dismissal. Quicken and especially accelerate refer to increase in rate of activity, growth, or progress: The skater's breathing quickened as he neared the end of his routine. The runner quickened her pace as she drew near the finish line. The economic expansion has continued but is no longer accelerating. Heat greatly accelerates the deterioration of perishable foods. Precipitate implies causing something to happen abruptly or prematurely: Mention of the issue precipitated an angry outburst during the meeting.See Also Synonyms at haste.