An anthro is, technically, an animal that can: a) walk upright, b) talk, or talk somewhat (AKA has human vocal chords), c) has human features (i.e. a centaur, half human, half horse), d) has the bone structure of a human, with some of its animal counterpart (i.e. a cat-anthro that although looks like a human, can jump like a cat). These characteristics separate anthros from humans with cat ears and tail (or something like that).
Jeremy was an anthro wolf. His nails were abnormally long, and his hair was scruffy like a wolfs hide. Ears protruded from his head, which followed sounds as as full wolfs would. Long tail protruding from his back swished side-to-side. Jeremy leaned against a rock, waiting for another of his kind.
1- man, human.
anthropology: study of man
anthropomorphic: shaped like man
and so on.
2- (slang) commonly used among fans of anthropomorphic or furry works (illustrations, paintings, comics, writing) as short hand for anthropomorph. While it's usage is incorrect, most people abide by the "STFU and die" rule; as in, it's become popular and recognized by such definition, though everyone knows that it's incorrect, it's too late to change it.
(Also, FIDs (Furries In Denial) must get over themselves before we can all just go back to calling ourselves furs)
2- "I don't draw "furries", I draw anthros."
It does NOT relate to lower-order animals.