daɪəˈmɛtɹɪk ˈɒpəzɪt ˈɑp(ə)sɪt ˈpəʊ̯lə(ɹ) ˈpoʊ̯lɚ characterized by opposite extremes; completely opposed in diametric contradiction to his claims diametrical (or opposite) points of view opposite meanings extreme and indefensible polar positions related to or along a diameter the diametral plane