Wiktionary
non-negative
a. 1 (context mathematics English) Of a real number, either positive or zero; not negative; greater than or equal to zero. 2 (context mathematics English) Of a real valued function, functional, ''etc.'' which has non-negative values over a particular domain ''D''. alt. 1 (context mathematics English) Of a real number, either positive or zero; not negative; greater than or equal to zero. 2 (context mathematics English) Of a real valued function, functional, ''etc.'' which has non-negative values over a particular domain ''D''.