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.

“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

Grandpa had a bad fall, and his shrewish second wife wants him carted off to a nursing home posthaste.

From Washington Post • Mar. 14, 2023

Restored, posthaste, thanks to the donations of the private equity tycoon David Rubinstein.

From Slate • Apr. 17, 2019

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