punctilious
Definitions
Showing great attention to detail or correct behavior.
Very careful and exact in the observance of the formalities or etiquette of conduct.
Examples
He was always punctilious about his appearance, ensuring every button was fastened and his tie was perfectly straight.
The professor was punctilious in his grading, leaving detailed feedback on every single assignment.
She maintained a punctilious record of all her expenses, accounting for every penny spent during the trip.
Synonyms
meticulous scrupulous conscientious precise diligent careful fastidious