from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Not synchronous; occurring at different times.
  • adj. Allowing the client to continue during processing.
  • adj. Having many actions occurring at a time, in any order, without waiting for each other; the style of communication used by Ajax.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Not simultaneous; not concurrent in time; -- opposed to synchronous.
  • adj. occurring in different geologic times; -- of taxa/
  • adj. chronologically misplaced; belonging to a different time or era.
  • adj. occurring at different speeds in different computers connected by a data transmission link; -- said of methods data of transmission between computers. Opposite of synchronous.

from The Century Dictionary and Cyclopedia

  • Not coinciding in time.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. not synchronous; not occurring or existing at the same time or having the same period or phase
  • adj. (digital communication) pertaining to a transmission technique that does not require a common clock between the communicating devices; timing signals are derived from special characters in the data stream itself


Sorry, no etymologies found.


  • The key in AJAX is the term asynchronous, which enables the browser to provide services and features in simple but exciting ways.

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  • Off to a slightly shaky start, the piece was roughly shoe-horned into the round table topic of the month but was ostensibly targeting the potential within asynchronous gameplay.

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  • I had thought to go to the recently deceased jdamicus and try getting some traction on the question that's pestering me, not as homework but strictly extra-curricular, about determination of jurisdiction in asynchronous electronic transactions.


  • The word asynchronous tells us that the information is not sent in predefined time slots.

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  • Yesterday, I was in serious danger of working on my PhD thesis so in desperation I looked into this whole Flickr web2.0 tag asynchronous feed business.

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  • To make synchronous code asynchronous, you can simply call an asynchronous method instead of a synchronous method and add a few keywords to the code, as shown in the examples below.

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  • While it's easy to make method calls asynchronous, it helps to know what actually happens when the program reaches an await statement.

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  • Even with the simplicity, why make file access calls asynchronous?

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  • Once you've selected photos to upload, you'll be able to conduct other tasks while the upload is taking place (aka asynchronous uploading).

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  • The replication is asynchronous -- in other words, the slaves do not have to acknowledge receipt of the data.

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