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thorough

adjectiveprepositionnouncommon in dialogue

  • United Kingdom//ˈθʌɹə//
  • Scotland//ˈθʌɾə//
  • //ˈθʊɹə//

Painstaking and careful not to miss or omit any detail.

adjective

  1. 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.

    Not enough! Your work has to be thorougher than this.

    It's the most thorough artwork I have ever seen!

    The infested house needs a thorough cleansing before being inhabitable again.

  2. 2

    Utter; complete; absolute.

    Dr. Oldfield once said to me, 'You talk to me quite all right, but why is it that you never open your lips at a committee meeting? You are a drone.' I appreciated the banter. The bees are ever busy, the drone is a thorough idler.

Etymology

From Middle English thoruȝ, þoruȝ, from Old English þuruh, a byform of Old English þurh, whence comes English through. The adjective derives from the preposition and adverb. The word developed a syllabic form in cases where the word was fully stressed: when it was used as an adverb, adjective, or noun, and less commonly when used as a preposition.

preposition

  1. 1

    archaicThrough.

    Ye might haue ſeene the frothy billowes fry Vnder the ſhip, as thorough them ſhe went […]

    You are contented to be led in triumph Thorough the streets of Rome?

    At length did cross an Albatross: / Thorough the fog it came; […]

noun

  1. 1

    A furrow between two ridges, to drain off the surface water.

    The Ignorance and Idleness of the Plowman, who either goes so shallow, or plows his Thoroughs so wide, or misses Part of the Ground.

Forms

plural
thoroughs
comparative
thorougher, more thorough
superlative
thoroughest, most thorough
The neighbouring pagesAlphabetical order follows the rules of the language, not byte values: an accent decides only between two otherwise identical words, and Spanish files Ñ as a letter of its own.

Lexical content from Wiktionary, under CC BY-SA 4.0 · Source entry · Data version 2026-08-23

Rank among the words of the OpenSubtitles 2018 corpus — film and television subtitles, so spoken rather than written usage (CC BY-SA 3.0).