See also: post-haste and post haste

English edit

Alternative forms edit

Etymology edit

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

Pronunciation edit

Adverb edit

posthaste (not comparable)

  1. quickly, as fast as someone travelling post; with great speed
    It is imperative that you finish your task posthaste.
    • 1946, Paramahansa Yogananda, “Chapter 17”, in Autobiography of a Yogi:
      "Sasi cannot last through the night." These words from his physician, and the spectacle of my friend, now reduced almost to a skeleton, sent me posthaste to Serampore.

Synonyms edit

Noun edit

posthaste (uncountable)

  1. Alternative spelling of post-haste