noun Date: 1763 the number 1 or any number (as 3, 12, 432) obtained by adding 1 to it one or more times ; a positive integer
NATURAL NUMBER
Meaning of NATURAL NUMBER in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012