[ thur-oh, thuhr-oh ]
/ ˈθɜr oʊ, ˈθʌr oʊ /


adverb, preposition

Archaic. through.


(initial capital letter) English History. the administrative policies of the Earl of Stafford and Archbishop Laud during the reign of Charles I: so called because they were uncompromisingly carried out.

Nearby words

  1. thornton, william,
  2. thorny,
  3. thoro,
  4. thorold,
  5. thoron,
  6. thorough bass,
  7. thorough brace,
  8. thoroughbred,
  9. thoroughfare,
  10. thoroughgoing

Origin of thorough

before 900; Middle English (preposition and adv.); Old English thuruh, variant of thurh through

Related forms Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for unthorough

  • The word “amateur” must not be taken here in the sense of superficial or unthorough.

    William Oughtred|Florian Cajori

British Dictionary definitions for unthorough


/ (ˈθʌrə) /


carried out completely and carefullya thorough search
(prenominal) uttera thorough bore
painstakingly carefulmy work is thorough
Derived Formsthoroughly, adverbthoroughness, noun

Word Origin for thorough

Old English thurh; related to Old Frisian thruch, Old Saxon thuru, Old High German duruh; see through


/ (ˈθʌrə) /


thoroughgoing policy, as adopted in England by Strafford and Laud during the reign of Charles I
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

Word Origin and History for unthorough



late 15c., adjectival use of Old English þuruh (adv.) "from end to end, from side to side," stressed variant of þurh (adv., prep.); see through. Related: thoroughly (c.1300).

Online Etymology Dictionary, © 2010 Douglas Harper