impunctual,a.|ɪmˈpʌŋktjuːəl| [f. im-2 + punctual.] Not punctual, behind time (Webster, 1864). So impunctuˈality, want of punctuality. 1790ObserverNo. 139 ⁋2 Unable to account for his impunctuality, some of his intimates were dispatched in quest of him.a1804Alex. Hamilton cited in Worcester.