executed without negligence or omissions

a thorough search.

complete; perfect; utter

thorough enjoyment.

extremely attentive to accuracy and detail; painstaking

a thorough worker; a thorough analysis.

having full command or mastery of an art, talent, etc.

a thorough actress.

extending or passing through.

Archaic . through.

( initial capital letter ) English History . the administrative policies of the Earl of Stafford and Archbishop Laud during the reign of Charles I

so called because they were uncompromisingly carried out.

noun

care , carefulness , fastidiousness , meticulousness , pain , painstaking , punctiliousness , scrupulousness