# vigilance

/ˈvɪdʒəɫəns/ (US) · /vˈɪdʒɪləns/ (UK) · CEFR C1 · Noun

Source: https://englishreference.com/word/vigilance
Updated: 2026-05-08

## Definition

the act of staying very careful and alert to find possible danger or trouble. You use this when someone needs to keep a close watch on a situation.

For teachers: the state or quality of keeping careful watch for possible danger or difficulties. Often associated with security, health monitoring, or civic duty.

## Examples

- The security guard maintained constant vigilance throughout the night.
- Public health officials urged continued vigilance as the flu season approached to prevent a major outbreak.
- The price of liberty is eternal vigilance, requiring citizens to remain active and informed about the shifting policies of their governing bodies.

## Usage notes

- Uncountable in its abstract sense; frequently paired with the verbs 'maintain', 'exercise', or 'require'.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.