Definition of instantaneousnext
as in immediate
done or occurring without any noticeable lapse in time the thunder following the flash of lightning was nearly instantaneous

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of instantaneous Some of these events are planned and attended by young adults, most of whom hardly remember a world before instantaneous digital communication. Audrey Pachuta, Chicago Tribune, 12 June 2026 For a wireless mouse, this input delivery rate is near-instantaneous, allowing for some rapid lag-free reaction times. George Yang, PC Magazine, 2 June 2026 Stranger Things debuted to instantaneous success on the streaming platform in 2016, concluding its five-season run last New Year’s Eve. Natalie Oganesyan, Deadline, 24 May 2026 However, those techniques could only provide long-term averages rather than instantaneous measurements. Rupendra Brahambhatt, Interesting Engineering, 10 May 2026 See All Example Sentences for instantaneous
Recent Examples of Synonyms for instantaneous
Adjective
  • The report's authors said the case highlights the importance of seeking immediate medical evaluation after any direct contact with a bat, even if there is no visible bite or scratch.
    Anthony Thompson, USA Today, 2 July 2026
  • The tang of the sauce was eye-widening and immediate, crackling with the bright, citrusy charge of tomatillos and serrano chiles.
    Jenn Harris, Los Angeles Times, 2 July 2026
Adjective
  • That one phrase tries to create an instant emotional connection.
    Kurt Knutsson, FOXNews.com, 5 July 2026
  • The recipe leans on instant pudding mix and strawberry gelatin to keep things extra effortless.
    Mary Shannon Wells, Southern Living, 5 July 2026

Browse Nearby Words

Cite this Entry

“Instantaneous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/instantaneous. Accessed 6 Jul. 2026.

More from Merriam-Webster on instantaneous

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster