vigilance

noun

vig·​i·​lance ˈvi-jə-lən(t)s 

: the quality or state of being vigilant

Synonyms of vigilance

• watchfulness
• watch
• alertness

Examples of vigilance in a Sentence

eternal vigilance is the price of freedom

Recent Examples on the Web

All the drones were shot down and caused no damage, authorities said, adding the action underscored Pakistan's round-the-clock vigilance and readiness. — ABC News, 23 Sep. 2026

Some studies indicate that nicotine may temporarily enhance attention, vigilance, reaction time and some aspects of working memory, but results are mixed. — Hasmeena Kathuria, The Conversation, 22 Sep. 2026

Kaepernick’s vigilance did, however, force us to consider the painful and problematic relationship between law enforcement and people of color. — Mike Jones, New York Times, 15 Sep. 2026

Finally, consider that the movement to protect kids from these harms is just beginning and will require constant evolution and vigilance to adapt to emerging threats. — Susan Morrisey, STAT, 15 Sep. 2026

Word History

First Known Use

1533, in the meaning defined above

Phrases Containing vigilance

• hyper-vigilance
• vigilance committee

Kids Definition

vigilance

noun

vig·​i·​lance ˈvij-ə-lən(t)s 

: the quality or state of being vigilant

Medical Definition

vigilance

noun

vig·​i·​lance ˈvij-ə-lən(t)s 

: the quality or state of being wakeful and alert : degree of wakefulness or responsiveness to stimuli

vigilant

-lənt 

adjective