Originally: of or relating to an obit or a person's death (especially in "obitual day"). In later use also: of the nature of, or reminiscent of, a newspaper obituary; obituarial.
obitual/əˈbɪtʃʊəl/ /əˈbɪtʃ(ʊ)l/ /əˈbɪtjʊəl/
Early 18th century; earliest use found in Phillips's New World of Words. Probably from post-classical Latin obitualis from classical Latin obitus + -al.