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[ US /ˈθɝoʊ, ˈθɔɹoʊ/ ]
[ UK /θˈʌɹɐ/ ]
ADJECTIVE
  1. performed comprehensively and completely; not superficial or partial
    thoroughgoing research
    an exhaustive study
    made a thorough search
  2. painstakingly careful and accurate
    thorough research
    our accountant is thorough
  3. without qualification; used informally as (often pejorative) intensifiers
    a thoroughgoing villain
    utter nonsense
    a perfect idiot
    what a sodding mess
    pure folly
    the unadulterated truth
    stark staring mad
    a consummate fool
    gross negligence
    an arrant fool
    a complete coward
    a double-dyed villain
    a thorough nuisance

How To Use thorough In A Sentence

  • I could perceive no trace of a metallic vein, so thoroughly had it been worked out, but scattered over the hillside with schist, talcose slate, and fragments of quartz, was a great deal of scoriae, showing that metal of some kind had been excavated, and that the smelting had been done on the spot. Wanderings by southern waters, eastern Aquitaine
  • I again affirm that I need make no apology for attaching my name to that of one so worthy the esteem of his co-dogs, ay, and co-cats too; for in spite of the differences which have so often raised up a barrier between the members of his race and ours, not even the noblest among us could be degraded by raising a "mew" to the honour of such a thoroughly honest dog. The Adventures of a Dog, and a Good Dog Too
  • If you want the greatest nutritional value from your corn, how should you eat it: raw, quickly steamed or thoroughly cooked?
  • The state has anted up $40 million for salary increases, but, in a program similar to Cincinnati's, Iowa will now evaluate teachers thoroughly to make sure the extra dough goes only to the good classroom performers, not the duds.
  • I'm afraid that's my training; always reconnoitre thoroughly. THE GWEN JOHN SCULPTURE
  • Directly opposite Damocles, two men were making a very thorough job of cleaning the window of a newsagent's. THE LAST TEMPTATION
  • As they negotiated the park gates and turned into the crowded thoroughfare, Patience sat, stiffly erect; inside, her emotions churned. A RAKE'S VOW
  • Applicants for government posts are always thoroughly investigated before being appointed.
  • Part 6 of the Shadow of the Bat (27: 00) takes another thoroughly extensive featurette that concentrates on dissecting the "toyetic" nature of DVD Talk
  • Restlessness is discontent - and discontent is the first necessity of progress. Show me a thoroughly satisfied man - and I will show you a failure. Thomas A. Edison 
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