əˈbaʊt tɚn əˈbaʊtˌfeɪs əˈbaʊtˌfeɪs ɹɪˈvɜː(ɹ)səl vɒltˈfæs a major change in attitude or principle or point of view an about-face on foreign policy act of pivoting 180 degrees, especially in a military formation change one's mind and assume the opposite viewpoint turn, usually 180 degrees