posthaste

adverb

Definition of posthastenext
as in quickly
with great speed ran posthaste for the doctor

Synonyms & Similar Words

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Antonyms & Near Antonyms

Example Sentences

Recent Examples of Synonyms for posthaste
  1. quickly
  2. rapidly
  3. swiftly
  4. quick
  5. soon
  6. fast
  7. promptly
  8. immediately
Adverb
  • Ruerup quickly rose through the ranks at Oxxford, gaining experience with everything from product and design to marketing and technology.
    — Jean E. Palmieri, Footwear News, 5 Oct. 2026
  • As the most lethal and airborne variant of the infection, pneumonic plague is nearly always fatal unless specific antibiotics are given quickly.
    — Mrigakshi Dixit, Interesting Engineering, 5 Oct. 2026
Definition of quickly
Adverb
  • All are alleged to have sent investors fake account statements and communications claiming their investments were either safe and sound or growing rapidly.
    — Amanda Gerut, Fortune, 1 Oct. 2026
  • The seconds-long loop consists of a purple image of a tank silhouette moving rapidly across the picture plane and patterned with what resemble dithered approximations of analog video interference.
    — Simon Denny, Artforum, 1 Oct. 2026
Definition of rapidly
Adverb
  • Authorities swiftly placed around 200 people under strict medical observation.
    — Mrigakshi Dixit, Interesting Engineering, 5 Oct. 2026
  • However, Jim is sticking with CEO Ernie Herrman, who promised on TJX's post-earnings call that fixes were swiftly put in place and already starting to bear fruit in the current quarter.
    — Natasha Abellard, CNBC, 2 Oct. 2026
Definition of swiftly
Adverb
  • That makes this 16-foot-long (5 m) SUV quicker than anything else Bentley's put out before, including the Continental GT.
    — New Atlas, New Atlas, 26 Sep. 2026
  • The launch includes a water-repellent, quick-drying jacket, a convertible cargo style and a six-panel hat, alongside five new eyewear designs.
    — Alexandra Harrell, Footwear News, 25 Sep. 2026
Definition of quick
Adverb
  • The rare show of alignment among fierce rivals was soon countered by comments from Meta’s Zuckerberg and Nvidia’s Jensen Huang, both of whom dismissed the slowdown idea.
    — Alyson Shontell, Fortune, 5 Oct. 2026
  • Now, the full-scale deployment of the ClarosTechUV PFAS destruction system is soon to take place at Daikin’s manufacturing facility in Decatur.
    — Prabhat Ranjan Mishra, Interesting Engineering, 5 Oct. 2026
Definition of soon
Adverb
  • For the longest time, artificial intelligence companies competed to make each new model faster and smarter.
    — Lim Hui Jie, CNBC, 29 Sep. 2026
  • For producers in western Bahia, the link promises faster, cheaper transit for vital agricultural goods, unlocking a new economic artery for northeastern Brazil.
    — Mrigakshi Dixit, Interesting Engineering, 29 Sep. 2026
Definition of fast
Adverb
  • This starts with every company that is training and deploying frontier models having robust internal processes and controls to ensure that their technology behaves as intended and that any issues are promptly identified and resolved.
    — Claire Carter, The Washington Examiner, 29 Sep. 2026
  • Experts recommend seeing a doctor promptly for any lump, swelling, pain or change in a testicle.
    — Melissa Rudy, FOXNews.com, 29 Sep. 2026
Definition of promptly
Adverb
  • His office did not immediately respond to questions from The Associated Press regarding a possible snap election.
    — JOSEPH WILSON, Arkansas Online, 3 Oct. 2026
  • Reps for Bryan and Gillette stadium did not immediately return a request for comment.
    — Charisma Madarang, Rolling Stone, 3 Oct. 2026
Definition of immediately
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.

Browse Nearby Words

postgraduates
posthaste
posthole
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Cite this Entry

“Posthaste.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/posthaste. Accessed 5 Oct. 2026.

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