n. [ Brazilian. ] (Zool.) The two-toed sloth (Cholopus didactylus), native of South America. It is about two feet long. Its color is a uniform grayish brown, sometimes with a reddish tint. [ 1913 Webster ]
a. Not given an audience; not received or heard. [ 1913 Webster ]
a. Inauspicious. Rowe. [ 1913 Webster ]
v. t. [ 1st pref. un- + authorize. ] To disown the authority of; to repudiate. [ 1913 Webster ]