watchful Copy link Outline 1. vĭgĭlans2. vĭgil (poet.) • watchful: 1. vĭgĭlans: a w. and keen-eyed tribune of the commons, vigilans et acutus tribunus plebis, Cic. Agr. 1, 1, 3. 2. vĭgil (poet.): w. eyes, vigiles oculi, Virg. Aen. 4, 182: v. wakeful. Phr.: to be w., vigilare, advigilare, vigilem esse: to keep a w. eye on anything, diligenter servare, observare, aliquid: v. to watch: to be w. against anything, cavere ab aliquo: v. to beware.