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speed

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1speed/ˈspiːd/noun
pluralspeeds
1speed
/ˈspiːd/
noun
pluralspeeds
Learner's definition of SPEED  
: the rate at which someone or something moves or travels
[noncount]
[count]
: the rate at which something happens or is done
[noncount]
[count]
[noncount] : the quality of being quick
photography [count] 
: a measurement that indicates how quickly film reacts to light and that is expressed as a number (such as 100 or 200)
   b : the time during which a camera's shutter is open
[count] : a gear in a vehicle or bicycle
[noncount]informal : an illegal drug that makes a person feel more excited and full of energy

at speed

chiefly British
: very quickly: at a fast speed

full speed ahead

— see 1full

up to speed

: having the latest information about something: having the knowledge that is needed to do or understand something
2speed/ˈspiːd/verb
speedssped/ˈspɛd/orspeededspeeding
2speed
/ˈspiːd/
verb
speedssped/ˈspɛd/orspeededspeeding
Learner's definition of SPEED  
always followed by an adverb or preposition[no object] : to move fast
always followed by an adverb or preposition[+ object] : to move (someone or something) somewhere very quickly
[no object] : to drive faster than the legal speed limit
[+ object]somewhat formal : to cause (an action, movement, process, etc.) to happen faster

speed up

[phrasal verb]
speed up or speed up (something or someone) or speed (something or someone) up 
: to become faster or to make (something or someone) faster
— see also speedup
Comments & Questions  
Comments & Questions
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