I.to keep watch or guard, Hdt., Thuc.
II.trans. to watch, guard, Hdt., Trag., etc.; στόμα φρουρεῖν εὔφημον, i. e. to keep silent, Eur.:—Pass. to be watched or guarded, Hdt., Trag.
III.Mid., like φυλάσσομαι, to be on one's guard against, beware of, c. acc., Eur.:—Act. in same sense, Soph., Eur.