Not positive; specifically (of a number) either negative or equal to zero; (of a function, variable, etc.) taking values which are always either negative or equal to zero.
Origin
Late 19th century; earliest use found in American Journal of Sociology. From non- + positive.
Definition of non-positive in US English:
non-positive
adjectivenɒnˈpɒzɪtɪv
Not positive; specifically (of a number) either negative or equal to zero; (of a function, variable, etc.) taking values which are always either negative or equal to zero.
Origin
Late 19th century; earliest use found in American Journal of Sociology. From non- + positive.