Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary
1

thorough

play
preposition thor·ough \ˈthər-(ˌ)ō, sometimes ˈthȯr-; ˈthə-(ˌ)rō\

Definition of thorough

archaic

  1. :  through



Origin and Etymology of thorough

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


First Known Use: before 12th century


2

thorough

play
adverb thor·ough \ˈthər-(ˌ)ō, sometimes ˈthȯr-; ˈthə-(ˌ)rō\

Definition of thorough

archaic

  1. :  through



Origin and Etymology of thorough

(see 1thorough)


First Known Use: before 12th century

Rhymes with thorough


3

thorough

play
adjective thor·ough \ˈthər-(ˌ)ō, sometimes ˈthȯr-; ˈthə-(ˌ)rō\

Simple Definition of thorough

  • : including every possible part or detail

  • : careful about doing something in an accurate and exact way

  • : complete or absolute

Source: Merriam-Webster's Learner's Dictionary

Full Definition of thorough

  1. 1 :  carried through to completion :  exhaustive <a thorough search>

  2. 2a :  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>

thoroughly

adverb

thoroughness

noun

Examples of thorough in a sentence

  1. … 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

  2. 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

  3. The job was uncharacteristically thorough for a Russian contract killing—three different types of bullets riddled Mikho's body. —New Republic, 15 Dec. 1997

  4. … as I look into their black faces, their hope is so thorough and consuming it frightens me. —Bob Shacochis, Harper's, February 1995

  5. a thorough understanding of the rules and regulations

  6. The investigator will have to be thorough.



Origin and Etymology of thorough

(see 1thorough)


First Known Use: 15th century


THOROUGH Defined for Kids

thorough

play
adjective thor·ough \ˈthər-ō\

Definition of thorough for Students

  1. 1 :  being such to the fullest degree :  complete <a thorough search>

  2. 2 :  careful about little things <a thorough worker>

thoroughly

adverb

thoroughness

noun




Seen and Heard

What made you want to look up thorough? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

a representation of something

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

confounded-person

Which is a synonym of indolent?

frenetic melancholy lazy philistine
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ