the arithmetical symbol 0 denoting the absence of all magnitude or quantity; nought
the point of departure in reckoning; specif the point from which the graduation of a scale, e.g. of a thermometer, begins
the temperature represented by the zero mark on a thermometer
nothing; nil
the lowest point or degree
informal a completely worthless or insignificant person or thing
zero adj
[French zéro via Italian from medieval Latin zephirum, from Arabic ṣifr zero, cipher1]