Definition of posthaste in US English:

posthaste

adverb

  • With great speed or immediacy.

    ‘she would go posthaste to England’
    • ‘But the very thought of the potential existence of that possibility is absolutely killing me, and thus must be extinguished post-haste.’
    • ‘I loved the film as well (and I'm going to start another thread post-haste on a possible phenomenon I saw in it).’
    • ‘Call the constable and arrange for a lynch mob post-haste.’
    • ‘They are currently awaiting the decision on a planning submission which, if approved, will send them off to structural engineers post-haste.’
    • ‘Mind you, if they made a movie of that, I might rouse myself from my burrow post-haste.’
    • ‘Which is better, post-haste posting or prior preparation and preening?’
    • ‘Pop the question now, and start planning post-haste.’
    • ‘The menu board outside and the bandstand inside inspired me to grab a table post-haste.’
    • ‘Our State and Federal Governments, intimidated by the medical fraternity's recent show of muscle, have scuttled new liability legislation through their parliaments post-haste.’
    • ‘Those who have seen it are encouraged to purchase it post-haste.’
    • ‘The persons responsible ought to be prosecuted in the first instance, the deck must be removed post-haste and the destroyed vegetation replaced immediately.’
    • ‘So it would behove us ‘poorly informed’ environmentalists and ‘street protesters’ to post-haste mend our errant ways.’
    • ‘This was sent to her post-haste and we heard that it was the main attraction at a dinner, which included foreigners.’
    • ‘So I suggest you finish up your vector-hunt post-haste and clear out.’
    • ‘The unmoved expression slowly creeping over Lily's face prompted him to continue explaining post-haste.’
    • ‘Or was she so strapped for time that she had to write it in post-haste and not even proof read it once.’
    • ‘I assured him that he could just leave it there in the receiving dock and I'd come get it post-haste.’
    • ‘His biggest turn-on is a girl in a bikini, so I had better get to the gym post-haste.’
    • ‘In the last letter, I had suggested you to reach my place by post-haste but you neither affirmed the proposal nor rejected it.’
    • ‘I haven't read the other two books in the trilogy, and that's a keen regret that I intend to do something about post-haste.’
    as quickly as possible, without delay, quickly, very quickly, speedily, swiftly, without further ado, without more ado, with all speed, promptly, immediately, at once, straight away, right away, directly, forthwith
    View synonyms

Origin

Mid 16th century: from the direction ‘haste, post, haste’, formerly given on letters.

Pronunciation

posthaste

/poʊstˈheɪst//pōstˈhāst/