Definition of posthaste in English:

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posthaste

Pronunciation: /pōstˈhāst/

adverb

With great speed or immediacy: she would go posthaste to England
More example sentences
  • The persons responsible ought to be prosecuted in the first instance, the deck must be removed post-haste and the destroyed vegetation replaced immediately.
  • Or was she so strapped for time that she had to write it in post-haste and not even proof read it once.
  • 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.
Synonyms
as quickly as possible, without delay, (very) quickly, speedily, without further/more ado, with all speed, promptly, immediately, at once, straightaway, right away
informal pronto, straight off, at warp speed

Origin

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

For editors and proofreaders

Syllabification: post·haste

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