posthaste

adverb

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

Synonyms & Similar Words

Relevance

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
  • The ceasefire quickly unraveled, and the 60-day deadline passed last month with no breakthroughs.
    — Arkansas Online, Arkansas Online, 28 Sep. 2026
  • The father-daughter pair embraced as Verlander started to cry, and the crowd quickly rose to their feet for a standing ovation.
    — Charlotte Phillipp, PEOPLE, 27 Sep. 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
  • Some are condemned swiftly and harshly, others are shrugged off almost entirely.
    — Matt Calkins OutKick, FOXNews.com, 24 Sep. 2026
  • Investment firms have swiftly raised price targets for Meta, as the company now has a compelling new narrative to pitch to Wall Street.
    — , CNBC, 23 Sep. 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
  • Deer are not appearing much on camera during the daytime, but that might change soon.
    — Bryan Hendricks, Arkansas Online, 27 Sep. 2026
  • The giant planet formed fairly soon after the sun (within a million years).
    — Keith Cooper, Space.com, 27 Sep. 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
  • The league immediately decided Juszczyk was imitating drinking beer.
    — Armando Salguero OutKick, FOXNews.com, 25 Sep. 2026
  • Abbott, who begins work immediately, joins the museum as its sixth director since 2008.
    — Jessica Gelt, Los Angeles Times, 25 Sep. 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
See all Nearby Words

Podcast

Theme music by Joshua Stamper ©2006 New Jerusalem Music/ASCAP

Cite this Entry

“Posthaste.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/posthaste. Accessed 2 Oct. 2026.

Copy Citation
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!

More from Merriam-Webster

Word of the Day

Listen to the pronunciation of heterodox

See Definitions and Examples »

Popular in Grammar & Usage

See More

Do You Need a New Language Peeve?

More Commonly Mispronounced Words

Merriam-Webster’s Great Big List of Words You Love to Hate

'A' or 'an'? What about before 'h'? An Indefinite Article Guide

Why is '-ed' sometimes pronounced at the end of a word?
See More

Popular in Wordplay

See More

7 Great Ways to Say 'Great'

The Longest Long Words List

9 Words That Sound Like Insults But Aren't

The Words of the Week - Oct. 2

16 Food Words Recently Added to the Dictionary
See More

Popular

See More

Do You Need a New Language Peeve?

7 Great Ways to Say 'Great'

The Longest Long Words List
See More

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
The Missing Letter A daily crossword with a twist
name tags
Words Named After People Quiz Find out who’s behind "leotard," "morphine," an...
See All