ἀφορισμός

ὁ
A. delimitation, assignment of boundaries, SIG 827 F 7; γῆς PFreib. 11.7 (iv A. D.); θέσεως Simp. in Ph. 626.20.
II. separation, distinction, Thphr. CP 3.14.2; ἀπὸ τοῦ λαοῦ Thd. Is. 56.3: hence, banishment, = Lat.relegatio, Lyd. Mag. 3.17 (pl.), Ost. 9c (pl.).
2. determination, Arist. Cat. 3b22.
3. attainment of definiteness, Thphr. Metaph. 28; distinctive character or feature, Alex.Aphr. in Top. 74.14.
4. pithy sentence, aphorism (such as those of Hp.), Critias 39 D., Ph. 1.636, Hermog. Id. 1.6.
5. fixed rule, Thphr. HP 9.2.1.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
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