Definition of teleiosis in English:
teleiosis
(also teleosis)
noun tɛlʌɪˈəʊsɪstɛleɪˈəʊsɪs
Perfection, completion, consummation.
Origin
Mid 19th century. From ancient Greek τελείωσις (also τελέωσις) completion from τελειοῦν to perfect, to complete (from τέλειος perfect, complete: see teleo-) + -σις.