[thur-oh, thuhr-oh]


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.

Origin of thorough

before 900; Middle English (preposition and adv.); Old English thuruh, variant of thurh through
Related formsthor·ough·ly, adverbthor·ough·ness, nounqua·si-thor·ough, adjectivequa·si-thor·ough·ly, adverbsu·per·thor·ough, adjectivesu·per·thor·ough·ly, adverbsu·per·thor·ough·ness, nounun·thor·ough, adjectiveun·thor·ough·ly, adverbun·thor·ough·ness, noun

Synonyms for thorough

Antonyms for thorough Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for thoroughness

Contemporary Examples of thoroughness

  • I can report that the thoroughness of the yin-yang between their personalities is inherently amusing.

    The Daily Beast logo
    TV's Funniest Frenemies

    Jessi Klein

    July 14, 2009

  • He explained the banking system in warm and friendly tones and with a candor and thoroughness Hoover had never attempted.

    The Daily Beast logo
    Obama's Speech and the Burden of History

    Harold Evans

    January 20, 2009

Historical Examples of thoroughness

British Dictionary definitions for thoroughness



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



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 thoroughness



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