The primary meaning of the Navajo word názbąs is circle, or in reference to that which is circular. There is a place on the Navajo reservation that is called Teec Nos Pos, which is a form of T’iis nazbas. It is a description of trees that are in a circular formation.
Názbąs has also been given a secondary meaning in the context of numbers. In this case it is the digit 0.