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Definition of thorough

thorough

/ˈθɝː.oʊ/
thor · ough

Adverb:thoroughly
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thorough Lexical Profile

thorough Game Scores & Validity

• adjective

1

Performed or written with great care and completeness, leaving no detail overlooked.

Example

"The inspectors conducted a thorough examination of the building's electrical wiring."


2

Taking great pains to do things accurately, methodically, and carefully (used of a person or their approach).

Example

"She is a thorough researcher who verifies every primary source before publishing."


3

Absolute or total in degree or extent (typically used before a noun for emphasis).

Example

"Despite the rainy weather, the outdoor concert was a thorough success."

Synonyms
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Antonyms
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Word Nuance & Usage

Often confused in spelling with 'through' and 'though'; historically, 'thorough' and 'through' were variant forms of the same word before their meanings diverged.

• Rhymes for thorough

Word Origin & Etymology

From Old English 'thuruh', an emphatic variant of 'thurh' (meaning 'through'), originally expressing the idea of passing completely from one end to the other.

Cite this Entry


Wordmom. (2026). Definition of Thorough. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/thorough
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