Tra từ speed - Từ điển Oxford Advanced Learner 8th

speed [speed speeds sped speeded speeding] noun, verb BrE [spiːd] NAmE [spiːd]
noun

RATE OF MOVEMENT/ACTION
1. countable, uncountable the rate at which sb/sth moves or travels
• He reduced speed and turned sharp left.
• The train began to pick up speed (= go faster).
•The car was gathering speed.
•a speed of 50 mph/80 kph
•at high/low/full/top speed
•at breakneck speed (= fast in a way that is dangerous)
•travelling at the speed of light/sound
•There are speed restrictions on this road.
•Increasing your walking speed will help to exercise your heart.
see also ↑airspeed, ↑ground speed
2. countable, uncountable the rate at which sth happens or is done
•the processing speed of the computer
• This course is designed so that students can progress at their own speed.
• We aim to increase the speed of delivery (= how quickly goods are sent).
3. uncountable the quality of being quick or rapid
• The accident was due to excessive speed.
• Speed is his greatest asset as a tennis player.
•She was overtaken by the speed of events (= things happened more quickly than she expected).
• (formal)A car flashed past them at speed (= fast).

IN PHOTOGRAPHY
4. countable a measurement of how sensitive film for cameras, etc. is to light
5. countable the time taken by a camera ↑shutter to open and close
•shutter speeds

ON BICYCLE/CAR
6. countable (especially in compounds)a gear on a bicycle, in a car, etc
•a four-speed gearbox
•a ten-speed mountain bike

DRUG
7. uncountable (informal)an illegal ↑amphetamine drug that is taken to give feelings of excitement and energy
more at more haste less speed at ↑haste, a turn of speed at ↑turn _n.

Word Origin:
Old English spēd (noun), spēdan (verb), from the Germanic base of Old English spōwan ‘prosper, succeed’, a sense reflected in early usage.

Thesaurus:
speed noun
1. C, U
•Students can progress at their own speed.
rate • • pace • • momentum • |written tempo •
at a… speed/rate/pace
increase the speed/rate/pace/momentum/tempo
gain/lose/pick up speed/momentum
a change of speed/pace/tempo
2. U
•The accident was due to excessive speed.
rapidity • |formal haste • |technical formal velocity •
increasing speed/rapidity/velocity
alarming/amazing/bewildering/remarkable speed/rapidity
reckless speed/haste

Example Bank:
•90% of car accidents involve excess speed.
•Business is moving at warp speed.
•Concorde crossed the Atlantic at twice the speed of sound.
•For a small car it has a good turn of speed.
•He drove us to the hospital at breakneck speed.
•He set a new land speed record in this car.
•He was running at full speed when a tendon snapped in his leg.
•He was traveling at a high rate of speed.
•Hedgehogs, though small, can move with surprising speed.
•Motorists are asked to reduce their speed in wet conditions.
•Radio waves travel at the speed of light.
•The Greek runner produced an electrifying burst of speed over the last 50 metres.
•The Kenyan runner put on a sudden burst of speed over the last 50 yards.
•The boat can be brought to a stop from full speed ahead within her own length.
•The boat maintained a steady speed while the sea was calm.
•The camera will choose a fast shutter speed.
•The car reaches a speed of 60 miles per hour within five seconds.
•The car was moving at speed when the accident happened.
•The glacier moves at an average speed of about six feet per day.
•The machinery is regulated to a safe running speed.
•The new houses have been built with astonishing speed.
•The ships have a maximum speed of 18 knots.
•The train pulled out of the station, slowly gathering speed.
•We offer subscribers a download speed of 8 MB.
•a significant increase in speed
•at lightning speed
•jets flying at supersonic speed
•measures to curb the speed of cars travelling through the village
•the increase in processor speeds for home computers
•He came down the hill at breakneck speed.
•She reduced speed before turning the corner.
•She was overtaken by the speed of events.
•The car flashed past them at speed.
•The classes are designed to let students progress at their own speed.
•The train began to pick up speed.
•We aim to increase the speed of delivery.
•We travelled at an average speed of about 80 kph.
•at full/top speed
Idioms: ↑full speed ahead ▪ ↑up to speed
Derived: ↑speed something up ▪ ↑speed up

verb (speed·ed, speed·ed In senses 1 and 2 sped is also used for the past tense and past participle.)

MOVE/HAPPEN QUICKLY
1. intransitive + adv./prep. (formal)to move along quickly
•The car sped along the road towards the village.
•He sped away on his bike.
•They sped off to get help.
2. transitive ~ sb/sth + adv./prep. (formal)to take sb/sth somewhere very quickly, especially in a vehicle
•The cab speeded them into the centre of the city.
3. transitive ~ sth (formal)to make sth happen more quickly
•The drugs will speed her recovery.

DRIVE TOO FAST
4. intransitive (usually used in the progressive tenses)to drive faster than the speed that is legally allowed
•The police caught him speeding.
Verb forms:

Word Origin:
Old English spēd (noun), spēdan (verb), from the Germanic base of Old English spōwan ‘prosper, succeed’, a sense reflected in early usage.

Example Bank:
•He couldn't hear the car that was speeding towards him.
•I sped back to her house as fast as I could, but she had already gone.
•Jock sped away on his bike.
•More is needed to speed the development of a safe and effective vaccine.
•The daring new technique dramatically speeded up the construction process.