# posthaste

> English word · Adverb · IPA /ˌpəʊstˈheɪst/

## Definitions
1. Quickly, as fast as someone travelling post; with great speed.

## Etymology
From the former instruction on letters ‘haste, post, haste’, later reinterpreted as a compound of post + haste.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/posthaste