slashed zero UK /ˌslæʃt ˈzɪə̯.əʊ̯/US /ˌslæʃt ˈzɪ(ə̯)ɹ.oʊ̯/ noun1 •A glyph variant of the numeral 0 (zero) with a slash, often used to distinguish from the upper case letter O (oh). formsslashed zeroes · slashed zeros