zero number

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/ˈzɪə.rəʊ/

/ˈzɪr.oʊ/ num (plural zeros or zeroes)

Definition

•

[C or U] (the number) 0; nothing

Five, four, three, two, one, zero.

The number one million is written with a one and six zeroes (mainly UK also noughts).

Heavy rain has reduced visibility almost to zero (= its lowest point).

•

[U] on a set of numbers for comparing temperature in degrees Celsius, the level of temperature at which water freezes

The temperature is expected to drop to ten degrees below zero tonight.

(Definition of zero number from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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Topic: Cardinal numbers, including nought and zero

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