'pʌŋ(k)tʃʊəl adj. +acting or arriving or performed exactly at the time appointed
on time, timely, prompt, Colloq on the dot:
Please be punctual, as I don't fancy waiting about in the street.
Advanced English Dictionary
+adjective happening or doing sth at the arranged or correct time; not late: She has been reliable and punctual. + a punctual start at 9 o'clock + Always be punctual for an interview. punctuality noun [U]: He insists on regular attendance and punctuality. punctually adverb: They always pay punctually.