Etymology 1Edit

From Old English þuruh.

Alternative formsEdit


thorough ‎(comparative more thorough, superlative most thorough)

  1. painstaking and careful not to miss or omit any detail
    The Prime Minister announced a thorough investigation into the death of a father of two in police custody.
    He is the most thorough worker I have ever seen.
    The infested house needs a thorough cleansing before it will be inhabitable.
  2. utter; complete; absolute
    It is a thorough pleasure to see him beg for mercy.
The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Help:How to check translations.
Derived termsEdit

Etymology 2Edit

A disyllabic form of Old English þurh ‎(through).



  1. (obsolete) Through. [9th-19th c.]


thorough ‎(plural thoroughs)

  1. (Britain, dialect) A furrow between two ridges, to drain off the surface water.
    (Can we find and add a quotation of Halliwell to this entry?)
Read in another language