posthaste

American

[pohst-hayst] / ˈpoʊstˈheɪst /

adverb

with the greatest possible speed or promptness.

to come to a friend's aid posthaste.

noun

Archaic. great haste.

posthaste British

/ ˈpəʊstˈheɪst /

adverb

with great haste; as fast as possible

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

noun

archaic great haste

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

posthaste Cultural

Immediately, with great speed: “Get the flood warning to the media posthaste.”

Etymology

Origin of posthaste

First recorded in 1530–40; post ³ + haste

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

posthaste

“Anora” fans must catch up with Manning Walker’s debut posthaste.

From Los Angeles Times ● Feb. 26, 2025

Unsurprisingly, the birds trashed the room, leaving tour manager John Courage to remove them posthaste.

From Salon ● Dec. 22, 2024

Smith will provide all discovery materials in the Jan. 6 case posthaste, as he did in the Mar-a-Lago case.

From Slate ● Aug. 2, 2023

If you were taken by Donnie Yen’s electrifying supporting turn in “John Wick: Chapter 4,” well, add this one to your queue posthaste.

From New York Times ● Jun. 30, 2023

Obviously you need to get back to Redwall posthaste.

From "Redwall" by Brian Jacques

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023