thorough

1 of 3

adjective

thor·​ough ˈthər-(ˌ)ō How to pronounce thorough (audio)
 sometimes  ˈthȯr-;
ˈthə-(ˌ)rō
1
: carried through to completion : exhaustive
a thorough search
2
a
: marked by full detail
a thorough description
b
: careful about detail : painstaking
a thorough scholar
c
: complete in all respects
thorough pleasure
d
: having full mastery (as of an art)
a thorough musician
thoroughness noun

thorough

2 of 3

preposition

archaic

thorough

3 of 3

adverb

archaic

Examples of thorough in a Sentence

Adjective … one realized that it was the restaurant's thorough and even comic Frenchness that had made it so entirely New York. Adam Gopnik, New Yorker, 22 Mar. 2004
Bruce tells me to squat down and Koani sidles up, ears flattened, tail tucked away, and gives my face a thorough licking. Nicholas Evans, Daily Telegraph, 26 Sept. 1998
The job was uncharacteristically thorough for a Russian contract killing—three different types of bullets riddled Mikho's body. New Republic, 15 Dec. 1997
a thorough understanding of the rules and regulations The investigator will have to be thorough.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Adjective
Give your resume and LinkedIn profile a thorough audit (or get a resume writer or career coach to help you), and find ways to creatively include these in-demand skills within them. Rachel Wells, Forbes.com, 1 May 2025 The model comes with seven flossing tips, a one-minute timer with a 30-second pacer to ensure thorough water flossing of all areas and a removable water reservoir with 90+ seconds of flossing time. Nora Colomer May Earn A Commission If You Buy Through Our Referral Links. This Content Was Created By A Team That Works Independently From The Fox Newsroom., FOXNews.com, 1 May 2025 In fact, the settlement outlines a deliberate, thorough transition process designed to minimize disruption and ensure a good fit for each resident. Lisa Seminara, Hartford Courant, 29 Apr. 2025 Authorities in Europe pledged a thorough investigation to identify the exact causes and ensure system resilience in the future. Tom Rogers, MSNBC Newsweek, 29 Apr. 2025 See All Example Sentences for thorough

Word History

Etymology

Preposition, Adjective, and Adverb

Middle English thorow, from Old English thurh, thuruh, preposition & adverb

First Known Use

Adjective

15th century, in the meaning defined at sense 1

Preposition

before the 12th century, in the meaning defined above

Adverb

before the 12th century, in the meaning defined above

Time Traveler
The first known use of thorough was before the 12th century

Browse Nearby Words

Cite this Entry

“Thorough.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thorough. Accessed 11 May. 2025.

Kids Definition

thorough

adjective
thor·​ough
ˈthər-ō,
ˈthə-rō
1
: marked by or carried out to completion : exhaustive
a thorough search
2
: careful about detail
a thorough worker
thoroughly adverb
thoroughness noun
Etymology

Adjective

Middle English thorow "thorough," from Old English thuruh, thurh "through" — related to thrill, through see Word History at thrill

More from Merriam-Webster on thorough

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