watchful, vigilant, wide-awake, alert mean being on the lookout especially for danger or opportunity. watchful is the least explicit term. vigilant suggests intense, unremitting, wary …

VIGILANT definition: 1. always being careful to notice things, especially possible danger: 2. always being careful to…. Learn more.

To be vigilant is to be watchful or alert for danger or some other kind of trouble. Vigilant can describe a person or an action.

Use vigilant to describe someone who keeps awake and alert in order to avoid danger or problems. When taking the subway, be vigilant about your wallet — always know where it is, …

Definition of vigilant adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Define vigilant. vigilant synonyms, vigilant pronunciation, vigilant translation, English dictionary definition of vigilant. adj. On the alert, as for danger or error; watchful.

• Travelers in foreign countries are reminded to be vigilant at all times. • Abdullahi was a small, slender, restless man with quick, vigilant eyes and an engagingly ugly face. • Be vigilant on …