zero

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1. The numeric symbol that represents the cardinal number zero. (countable, uncountable) · In unary and k-adic notation in general, zero is the empty string.· Write 0.0 to indicate a floating point number rather than the integer zero.
2. The digit 0 in the decimal, binary, and all other base numbering systems. (countable, uncountable) · One million has six zeroes.
3. Nothing, or none. (informal, uncountable) · zero-defect· The shipment was lost, so they had zero in stock.
4. The value of a magnitude corresponding to the cardinal number zero. (countable, uncountable) · The electromagnetic field does not drop all of the way to zero before a reversal.
5. The point on a scale at which numbering or measurement originates. (countable, uncountable) · The temperature outside is ten degrees below zero.
6. A value of the independent variables of a function, for which the function is equal to zero. (countable, uncountable) · The zeroes of a polynomial are its roots by the fundamental theorem of algebra.· The derivative of a continuous, differentiable function that twice crosses the axis must have a zero.
7. The additive identity element of a monoid or greater algebraic structure, particularly a group or ring. (countable, uncountable) · Since a commutative zero is the inverse of any additive identity, it must be unique when it exists.· The zero (of a ring or field) has the property that the product of the zero with any element yields the zero.
8. A person dismissed as unimportant. (countable, slang, uncountable) · They rudely treated him like a zero.

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