Henry George Liddell, Robert Scott, A Greek-English Lexicon

A.guardian of the laws, title of officials appointed to watch over the laws and their observance, Pl.Lg.755a, 770c, etc.; “οἱ ν. ἀριστοκρατικόν” Arist.Pol.1323a8, cf. Cic.Legg.3.20.46; at Athens, Philoch.141b, etc.; at Sparta, Paus.3.11.2, IG5(1).31, al.; at Thasos, BCH52.55 (iv/iii B.C.); at Alexandria, PHal.1.42 (iii B.C.), prob. in Mitteis Chr.369 i 33 (iii B.C.); at Priene, SIG282.17 (iv B.C.); at Cyrene, Abh.Berl.Akad. 1925(5).7 (iii B.C.).

2. observer of the law, “σὺ ἡ ν.” LXX l.c.

II. minor official under control of village elders, with police and fiscal duties, PAmh.2.108.8, BGU759.20, PRyl.122.7, POxy.1440.7 (all ii A.D.).