From The Collaborative International Dictionary of English v.0.48: Onus \O"nus\, n. [L.] A burden; an obligation. [1913 Webster] Onus probandi[L.], the obligation to furnish evidence to prove an assertion; the burden of proof. [1913 Webster]
Onus \O"nus\, n. [L.] A burden; an obligation. [1913 Webster]
Onus probandi[L.], the obligation to furnish evidence to prove an assertion; the burden of proof. [1913 Webster]
