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
  • In Congress, crypto companies are pushing for market-structure rules, AI firms are battling over how Washington will regulate their rapidly expanding industry, and sports-betting operators are confronting regulatory fights.
    — Luke Fountain, CNBC, 8 Oct. 2026
  • The storm could rapidly intensify in those conditions, but forecasters said a blockade of storm-shredding wind shear near the coast could slow it slightly before landfall.
    — Alex Harris, Miami Herald, 8 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
  • The hope is that the mRNA vaccine can target emerging strains quicker, according to the CDC.
    — Stephen Underwood, Hartford Courant, 2 Oct. 2026
  • The ribbed knit is absorbent and quick-drying with a combed cotton material that’s ultra-soft to the touch.
    — Caley Sturgill, Southern Living, 2 Oct. 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
  • With this fast-approaching launch date and the program’s brief approval window, travelers could have an Argentine passport in hand in a matter of months.
    — Jessica Puckett, Condé Nast Traveler, 7 Oct. 2026
  • India, which remains the world's fastest-growing major economy, is among the countries most vulnerable to the supply disruptions caused by the Iran war.
    — Priyanka Salve, CNBC, 7 Oct. 2026
Definition of fast
Adverb
  • Contact the treating clinician promptly for worsening pain, spreading redness or warmth, pus-like drainage, fever, extensive blistering, eye symptoms, or a reaction substantially more severe than described.
    — Malana VanTyler, Miami Herald, 6 Oct. 2026
  • The company encouraged employees to use Microsoft Teams, but while some replied promptly, others put their own work first.
    — Bilin Lin, Fortune, 5 Oct. 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 10 Oct. 2026.

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