ὅρος .ὅρος, Ionic οὖρος, ὁ, a boundary, landmark, and in pl. bounds, boundaries, Il., etc.:— the boundary between two places is expressed by putting both in gen., οὖρος τῆς Μηδικῆς καὶ τῆς Λυδικῆς Hdt.: generally, a boundary, limit, ἑβδομήκοντα ἔτη οὖρον τῆς ζόης ἀνθρώπῳ προτίθημι I set 70 years as the limit of human life, Hdt.; metaph. of a womanʼs mind, Aesch. in pl. marking-stones (στῆλαι, cippi), bearing inscriptions, Hdt.: in Attic Law, stone tablets set up on mortgaged lands as a register of the debt, Dem. a limit, rule, standard, measure, Plat., Dem., etc. an end, aim, Dem., etc. in Aristotleʼs Logic, the term of a proposition:—its definition, species: so, in Mathematics, ὅροι are the terms of a ratio or proportion, Arist.