One of the mysteries of the English language finally explained.
Mid 18th century; earliest use found in Nathan Bailey (d. 1742), lexicographer and schoolmaster. From post-classical Latin noctambulus sleepwalker (1649 in a work title; from classical Latin noct- + -ambulus (in e.g. fūnambulus)) + -ous.
In this article we explore how to impress employers with a spot-on CV.