Delay vs Latency

When to use each in English, with meaning, register, and examples.

Delay

Top 1,000 (very common)B2noun

Latency

Beyond 10,000 (less common)
Most common: Delay
 DelayLatency
Pronunciation🇬🇧 /["/dɪˈleɪ/"]/🇺🇸 /["/dɪˈleɪ/"]/🇬🇧 //ˈleɪtənsɪ//🇺🇸 //ˈleɪtənsi//
MeaningTo make something happen later than planned.The time it takes for something to happen after a request is made.
ExampleDue to the heavy traffic, there was a significant delay in our arrival time.The latency in the network caused significant delays during the video conference.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Beyond 10,000 (less common)
CEFR levelB2-
Part of speechnoun
Collocationsconsiderable, enormous, lengthy, series, be subject to, be plagued by, encounter, occur, without delay, delay in, delay of, considerable, enormous, lengthy, series, be subject to, be plagued by, encounter, occur, without delay, delay in, delay ofnetwork latency, high latency, reduce latency, latency issues, low latency
Antonymsadvance, hasten, expedite-
Common mistakesConfusing 'delay' with 'defer' — 'defer' is often more formal., Using 'delayed' incorrectly in tense — check verb forms for accuracy., Overusing 'delay' in casual speech when simpler options like 'wait' are available.Confused with 'laziness' - learners may mix terms due to phonetic similarity., Using 'latency' as a verb - ‘latency’ is always a noun., Misunderstanding the concept - many think it's just delay without considering its technical context.
Usage notesUse 'delay' when referring to postponing events or actions. It's appropriate in both formal and informal contexts, but avoid using it in very casual conversations where simpler words like 'wait' might suffice.Commonly used in technology and communications contexts. Avoid in casual conversations unless discussing tech-related topics.

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Delay

Frequently asked questions: Delay vs Latency

What's the difference between Delay and Latency?

Delay: To make something happen later than planned. Latency: The time it takes for something to happen after a request is made.

Which is more common: Delay and Latency?

Delay is the most common in everyday English.

Can you show an example of each?

Delay: Due to the heavy traffic, there was a significant delay in our arrival time. Latency: The latency in the network caused significant delays during the video conference.

Can I use Delay and Latency interchangeably?

Not always. Delay and Latency are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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