Synonyms

posthaste

American

[pohst-heyst] / 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

But part of the job of Rizzo and his staff is to find players who will help this process posthaste.

From Washington Post ● May 24, 2022

Obviously you need to get back to Redwall posthaste.

From "Redwall" by Brian Jacques

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