Definition of "Ώ"

Monotonic script of the upper case Greek omega: Ώ,Ὼ, Ὤ, ᾬ, Ὢ, ᾪ, Ὦ, ᾮ, Ὥ, ᾭ, Ὣ, ᾫ, Ὧ, ᾯ (polytonic realizations of Ω with stress accents and/or breathing marks, subscript iota.)  examples