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 Seth at Berm Peak suggests that the shifting is instantaneous and seemingly perfect, without clicking or chain slipping. Kevin Purdy, Ars Technica, 4 Feb. 2025 Albert Einstein founded his theories of relativity on the notion that nothing can travel faster than the speed of light, however, something that should preclude the instantaneous nature of entanglement. Robert Lea, Space.com, 7 Jan. 2025 The late-night policy sessions and social media posts, crafted for an instantaneous affect, observers tell USA TODAY, were unheard of during those years. Phillip M. Bailey, USA TODAY, 2 Feb. 2025 Nerve stimulation and power density tests measure the instantaneous effects on a person’s nervous system. IEEE Spectrum, 29 Jan. 2025 See All Example Sentences for instantaneous

Browse Nearby Words

Cite this Entry

“Instantaneous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/instantaneous. Accessed 13 Mar. 2025.

More from Merriam-Webster on instantaneous

Last Updated: - Updated example sentences
Love words? Need even more definitions?

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