Vigilant

medium

VIJ-ih-lunt

adjective

Definition

Keeping careful watch for possible danger or difficulties

Examples

Security guards must remain vigilant at all times.
Parents should be vigilant about their children's online activities.

Synonyms

watchfulalertattentivecircumspect

Antonyms

negligentinattentiveobliviouscomplacent

Categories

GRE Tip

Vigilant is a medium-difficulty GRE word. On the GRE, you might see it paired with synonyms like "watchful" or "alert" in Sentence Equivalence questions. Look for contrast clues (however, despite, although) that signal the opposite meaning. Words like "negligent".

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