
Definition of Natural numbers
1. Noun. (context: number theory) The set of positive integers, {1, 2, 3, ...}. ¹
2. Noun. (context: set theory computer science) The set of nonnegative integers, ? = {0, 1, 2, 3, ...}, being the smallest such that: ¹
¹ Source: wiktionary.com
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