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  • real time
    real time
    noun
    the actual time elapsed in the performance of a computation by a computer, the result of the computation being required for the continuation of a physical process.
  • real-time
    real-time
    adjective
    of or relating to applications in which the computer must respond as rapidly as required by the user or necessitated by the process being controlled.
Synonyms

real time

1 American  
[ree-uhl, reel] / ˈri əl, ril /

noun

  • real times
    plural
  1. Computers. the actual time elapsed in the performance of a computation by a computer, the result of the computation being required for the continuation of a physical process.

  2. the actual time during which a process takes place or an event occurs.


idioms

  1. in real time, at once; instantaneously.

real-time 2 American  
[ree-uhl-tahym, reel-] / ˈri əlˈtaɪm, ˈril- /

adjective

Computers.
  1. of or relating to applications in which the computer must respond as rapidly as required by the user or necessitated by the process being controlled.


real-time British  

adjective

  1. denoting or relating to a data-processing system in which a computer receives constantly changing data, such as information relating to air-traffic control, travel booking systems, etc, and processes it sufficiently rapidly to be able to control the source of the data

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

real-time Cultural  
  1. A term used to describe computer systems that update information at the same rate as they receive data.


Other Word Forms

Noun Inflected Forms


Etymology

Origin of real time

First recorded in 1950–55


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

"Our team worked on this experiment for many years. Now, we can track electrons moving across the entire energy landscape of a solid in real time," says Rupert Huber.

From Science Daily ● Nov. 14, 2026

It has become essential for managing user requests for generative AI in real time, as these require processing vast amounts of data.

From Barron's ● Nov. 12, 2026

"We had to explore and dig deep to hear and see how this experiment can work in real time - that was huge to see," he said.

From BBC ● Oct. 31, 2026

In Spain, we are seeing this decline in real time.

From The Wall Street Journal ● Oct. 30, 2026

In real time, the universe has a beginning and an end at singularities that form a boundary to space-time and at which the laws of science break down.

From "A Brief History of Time: And Other Essays" by Stephen Hawking

The team also performed complementary experiments in Prague, where samples could be examined over longer periods outside the real-time imaging setup.

From Science Daily ● Nov. 13, 2026

As millions of 2026 ballots are being counted, our contributors will offer real-time commentary on the state of play.

From The Wall Street Journal ● Nov. 4, 2026

When Cal Fire began advertising a new app for near real-time updates on wildfires and evacuations this month, Instagram users quickly noticed some similarities to another app on their phone.

From Los Angeles Times ● Oct. 30, 2026

“That has now proliferated into a myth that won’t quit, yet it isn’t actually helpful in today’s algorithms, as airlines price in real-time based on inventory.”

From MarketWatch ● Oct. 28, 2026

There were no windows, but the walls were enchanted to show real-time footage from Camp Half-Blood—the beach, the forest, the strawberry fields—although now Leo was wondering if this made people homesick rather than happy.

From "The Mark of Athena" by Rick Riordan

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