anoxiaPronunciation: /aˈnɒksɪə/Definition of anoxia noun [mass noun] technical an absence of oxygen. Medicine an absence or deficiency of oxygen reaching the tissues; severe hypoxia: death due to anoxia resulting from strangulationDerivatives anoxic adjective Origin: 1930s: from an-1 + ox(ygen) + -ia1anoxia in other Oxford dictionaries Definition of anoxia in the US English dictionary