instantaneously

adverb

as in immediately
without delay I had just slammed the car door shut when I instantaneously remembered that I had left the keys inside

Synonyms & Similar Words

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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 instantaneously The secret lies in servo motors at the end of each propeller arm, which instantaneously tilt the props fore and aft as needed. — New Atlas, 10 Aug. 2026 As the gas rapidly accumulates within these tiny crevices, the bubbles expand almost instantaneously and push the beverage violently out of the bottle to create a soda fountain, also called a geyser. — Encyclopedia Britannica, 5 Aug. 2026 Building cars is one thing, but building that kind of instantaneously recognizable brand requires a deft hand. — Michael Teo Van Runkle, Forbes.com, 1 Aug. 2026 As fresh visual information reaches the brain, these models are updated almost instantaneously, allowing movements to be adjusted before conscious awareness has caught up. — Michelle Spear, Scientific American, 11 July 2026 The chicken and the egg come into existence instantaneously and simultaneously. — Peter Gosselin, Harpers Magazine, 30 June 2026 Almost instantaneously, Garcia drew his weapon and fired nine shots at Denis’s departing vehicle. — Brittany Wallman, Miami Herald, 24 June 2026 That happened instantaneously in a way no other life experience has affected us before. — Breanne L. Heldman, PEOPLE, 23 June 2026 Friendships are formed instantaneously; by day four, these men know each other more deeply than many of their friends and relatives. — Rob Picheta, CNN Money, 21 June 2026
Recent Examples of Synonyms for instantaneously
  1. immediately
  2. instantly
  3. promptly
  4. now
  5. directly
Adverb
  • Clark immediately started limping and grimaced as she was subbed out.
    — James Boyd, New York Times, 15 Aug. 2026
  • Instead of committing immediately to a single vehicle architecture, the Army is effectively subjecting multiple approaches to the same test regime and allowing battlefield performance to determine which ones deserve further investment.
    — Kaif Shaikh, Interesting Engineering, 14 Aug. 2026
Definition of immediately
Adverb
  • As reporters and Mangione fans streamed out of the courthouse, instantly greeted by a swarm of cameras and curious passersby, Thompson’s family issued a statement that refocused the human stakes of the proceedings.
    — Dan Adler, Vanity Fair, 14 Aug. 2026
  • Even beneath the stark, soulless glare of studio lights, the Valen is instantly arresting.
    — Tim Pitt, Robb Report, 14 Aug. 2026
Definition of instantly
Adverb
  • Clean up dog poop promptly; keep up with veterinary care and parasite prevention; and clean the bowls, bedding, crates, and toys of a pet being treated for giardia.
    — Angela Haupt, Time, 12 Aug. 2026
  • The Dodgers had lost seven in a row before finally winning Saturday at Arizona, then promptly resumed the slide Sunday with a loss to the Diamondbacks.
    — Los Angeles Times, Los Angeles Times, 11 Aug. 2026
Definition of promptly
Adverb
  • There will be sharp policy disagreements between now and Election Day, and that is a good thing.
    — Jeffrey Sonnenfeld, Hartford Courant, 13 Aug. 2026
  • With these new inscriptions, the UNESCO World Heritage List is now made up of 1,273 sites across 173 countries.
    — Brittany Anas, Forbes.com, 13 Aug. 2026
Definition of now
Adverb
  • McIntosh’s catch features a high elbow and fingers pointing directly down toward the bottom of the pool, resulting in a strong grip on the water.
    — Sarah Shephard, New York Times, 14 Aug. 2026
  • Why This Eclipse Is Special Lunar eclipses occur only during a full moon, when Earth passes directly between the sun and the moon.
    — Jamie Carter, Forbes.com, 13 Aug. 2026
Definition of directly

Browse Nearby Words

instantaneous
instantaneously
instanter
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Cite this Entry

“Instantaneously.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/instantaneously. Accessed 20 Aug. 2026.

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More from Merriam-Webster on instantaneously

Nglish: Translation of instantaneously for Spanish Speakers

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