/ pʌŋkˈtɪliəs; NAmE / adjective
( formal ) very careful to behave correctly or to perform your duties exactly as you should :
a punctilious host
► punc·tili·ous·ly adverb
► punc·tili·ous·ness noun [ U ]
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WORD ORIGIN
mid 17th cent.: from French pointilleux , from pointille , from Italian puntiglio , diminutive of punto a point.