Definition of asynchronous in US English:



  • 1(of two or more objects or events) not existing or happening at the same time.

    • ‘Far more use could be made of asynchronous communication to reduce interruptions.’
    • ‘The only time services work online is when we accept this is an asynchronous media.’
    • ‘It is not commonly known that, luckily for the U.S. economy, the 1990s was a period dominated by asynchronous global recessions, when key economies took turns going into recession.’
    • ‘Foreshadowing email, they made informal, asynchronous communication with your co-workers a major part of modern office life.’
    • ‘This seeming paradox - that bringing two or more people into a conversation is more efficient than a series of asynchronous emails or voice mails - is simply explained.’
    • ‘Consequently, there appears to be some asynchronous breeding in the population, possibly allowing males excluded from the area in the initial part of the season to obtain copulations.’
    • ‘Hatching may be synchronous or asynchronous (one or two days apart).’
    • ‘It's like having an extended asynchronous conversation and being able to save what were once stray thoughts.’
    • ‘Like e-mail, SMS is asynchronous, which allows users to respond when it is convenient.’
    • ‘While it is not feasible to allot extra in-class time to one subject over others to reap the benefits of repetition, an advantage of asynchronous web-based materials is that they can be assigned outside of class.’
    • ‘The course syllabus, competencies, unit objectives, topics for asynchronous discussion, and exams will be available to the student in a Web-enhanced environment.’
    • ‘The popularity of email stems largely from its user friendliness, efficiency, and versatility in facilitating asynchronous communication.’
    • ‘The enhancement of online learning through interaction comes in both synchronous and asynchronous exchanges.’
    • ‘Like speech, e-communication may be essentially immediate; unlike speech, it may be deeply asynchronous, and always unpredictably so.’
    • ‘Collaborative learning was achieved through synchronous as well as asynchronous interactive chats.’
  • 2Computing Telecommunications
    Of or requiring a form of computer control timing protocol in which a specific operation begins upon receipt of an indication (signal) that the preceding operation has been completed.

    • ‘The company has been doing research on asynchronous computing for more than ten years.’
    • ‘To achieve this fine-grained control, detailed, real-time, asynchronous messages are sent back and forth between the application and media servers.’
    • ‘In the early days of computing, both asynchronous and synchronous circuits were used in computers, but the latter came to dominate because they were easier to design, test and debug.’
    • ‘The answer may be more analogous to an alternative method of coordinating operations known as asynchronous computing.’
    • ‘On the other hand, when an asynchronous transmission request is issued, the reception device does not wait for the requested object to arrive before decoding another instruction.’
    • ‘This enables a high-data throughput between the synchronous circuit and the asynchronous circuit independently of a clock frequency of the synchronous circuit.’
    • ‘The upgraded system provides high-speed digital microwave radios, asynchronous transfer mode bandwidth management, and a new network management system.’
  • 3(of a machine or motor) not working in time with the alternations of current.

    • ‘The three-phase asynchronous motor makes use of the induction principle for converting electrical energy into mechanical energy.’
    • ‘Industrial automation has placed increasing demands on asynchronous motor drives and the tasks performed by these machines are becoming ever more complex.’
    • ‘Power losses occurring during the operation of a controlled asynchronous motor are calculated and used to determine the parameters of the cooling air flow produced by a ventilator.’
    • ‘Second, an asynchronous engine is definitely more complex than existing sequential engines.’
    • ‘Although the construction of asynchronous motors is simple and their equivalent circuits and operations are well understood, it is still considered the most difficult topic to learn and teach.’
  • 4Astronomy
    (of a satellite) revolving around the parent planet at a different rate from that at which the planet rotates.

    • ‘And asynchronous satellites orbit at 400 miles above the Earth, while polar satellites orbit much lower than that, and geostationary satellites orbit at 22,223 miles above the Earth or rather less than 22,000 nautical miles.’
    1. 4.1 (of an orbit) such that a satellite in it is asynchronous.
      • ‘The scheduled Space Shuttles use a much lower, asynchronous orbit, which means they pass overhead at different times of the day.’
      • ‘However, there are lots of satellites that pass overhead in asynchronous orbits that are only 200 or 300 miles away.’
      • ‘That this first asynchronous low orbit satellite scheme was made obsolete by the development and placing of extreme altitude synchronous orbit satellites does not diminish the grandeur of the achievement.’