The number or numeral 0, which means no quantity or amount at all. When you add zero to any number or subtract zero from any number, the number remains the same.
A point on a thermometer or other scale at which numbering or measurement begins. The temperature outside is ten degrees above zero Fahrenheit.
Nothing, nought. The business did not lose money, but its profit was zero.
(slang) A person of little or no importance.
(mathematics) (of a function) A value of the function's independent variable for which the function is equal to zero.
Italian: non + verb + nessun + singular m noun, non + verb + nessuno + singular m noun beginning with s + consonant, gn, ps, x or z, non + verb + nessuna + singular f noun (1), zero (2)