INSTANTANEOUS Synonyms: 20 Similar and Opposite Words

instantaneous

adjective

ˌin(t)-stən-ˈtā-nē-əs

Definition of instantaneous

as in immediate

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

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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 The standard 80% of financial advice—such as whether to invest or pay off debt, how much money to set aside for emergencies or if a purchase will interfere with a savings goal—becomes instantaneous, free and accessible to anybody with a smartphone. — Antoine Sallis, Forbes.com, 23 Sep. 2026 Lauletta and team have ambitions to achieve a rare feat in the sport — building a brand big enough to generate instantaneous recognition beyond the NASCAR bubble. — Jordan Bianchi, New York Times, 15 Sep. 2026 During the test, the laser did not appear as a long continuous light but rather an invisible almost instantaneous heat beam that hit precise points on the drone. — Eleanor Watson, CBS News, 7 Sep. 2026 But his son went to meet Kaya, and the connection was almost instantaneous. — Alicia Urrea, Billboard, 27 Aug. 2026 See All Example Sentences for instantaneous

Recent Examples of Synonyms for instantaneous

Adjective

Its biotechnology could now serve a more immediate military application.

— Aamir Khollam, Interesting Engineering, 23 Oct. 2026
The Times reached out to Script botanicals for comment but did not receive an immediate response.

— Karen Garcia, Los Angeles Times, 23 Oct. 2026

Definition of immediate

Adjective

The song topped the Billboard Hot 100 chart for nine consecutive weeks, became an instant hallmark of the mid-2000s, and cemented Ne-Yo’s brand of heartfelt autofiction.

— Clover Hope, Pitchfork, 25 Oct. 2026
Local reports from Kyiv overnight suggested that there was an instant operational impact following the move.

— Leonie Kidd, CNBC, 23 Oct. 2026

Definition of instant

Browse Nearby Words

instant

instantaneous

instantaneously

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“Instantaneous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/instantaneous. Accessed 28 Oct. 2026.

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Synonyms of instantaneous

adjective

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