Definition of natural number
1
: the number 1 or any number (such as 3, 12, 432) obtained by adding 1 to it one or more times : a positive integer
2
: any of the positive integers together with 0 : a nonnegative integer
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MerriamWebster unabridged
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Time Traveler for natural number
The first known use of natural number was in 1763
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