thorough

Universal Words adjective 1 done completely; with great attention to detail: a thorough knowledge of the subject * The police carried out a thorough investigation. 2 [notusuallybeforenoun] (of a person) doing things very carefully and with great attention to detail: She's very thorough and conscientious. * He was determined to be thorough in his research. 3 (BrE, informal) used to emphasize how bad or annoying sb/sth is: Everything was in a thorough mess. thoroughness noun [U]: I was impressed by the thoroughness of the report. * I admire his thoroughness.