VIGILANT Copy link • VIGILANTvigilans: vigil. To be vigilant, vigilare: advigilare: to be very vigilant, mirifica esse vigilantia: to keep a vigilant eye upon, diligenter custodire aliquid or aliquem: to be vigilant in anybody’s service, excubare vigilareque pro aliquo (Cic.): vigilant care, vigilantes curae (Cic., IMPROP.). If cautious, Vid.