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

Proving this will require experiments that directly test how the rhythm affects brain cleaning, vigilance, and survival. —Rupendra Brahambhatt, Interesting Engineering, 24 Jan. 2026

Italy’s own history, including the consequences of fascist racial laws and deportations, has shaped a national commitment to remembrance, education and vigilance. —Brian Siegal, Sun Sentinel, 22 Jan. 2026

Implementation will require vigilance, coordination, and enforcement on an unprecedented scale. —Melissa Cristina Márquez, Forbes.com, 19 Jan. 2026

Children are born into vulnerability and mothers into vigilance; and even then our best may not be good enough. —Rebecca Mead, New Yorker, 19 Jan. 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