unnatural /ʌnˈnæt͡ʃ.(ə.)ɹəl/adjective 3noun 1forms 3 adjective3 •Not natural. •Not occurring in nature, the environment or atmosphere •Going against nature; perverse.One mother, when she heard that her daughter intended to take up medicine, retired to her room and wept, bewailing the fact that she had given birth to an "unnatural daughter." — 1976 noun1 •(offensive) One who is unnatural, against nature, perverse.Deviants, heretics, pinks, false prophets and other unnaturals will not be spared the rod nor the stark fist of removal. — 1992 formsunnaturals · more unnatural · most unnatural