omnicomprehensiveness UK /ˌɒmniˌkɒm.pɹɪˈhɛn.sɪvnəs/US /ˌɑmniˌkɑm.pɹəˈhɛn.sɪvnɪs/ noun1 •(rare) The state of being omnicomprehensive; thoroughgoing comprehension.By virtue of the prioity of form and the omnicomprehensiveness of the human intellective form, we must conclude that the world is in the spirit and in man and not vice versa. — 1984