watchful

adjective

watch·​ful ˈwäch-fəl 

ˈwȯch-

1

archaic

a

: not able or accustomed to sleep or rest : wakeful

b

: causing sleeplessness

c

: spent in wakefulness : sleepless

2

: carefully observant or attentive : being on the watch

watchfully

ˈwäch-fə-lē 

ˈwȯch-

adverb

watchfulness noun

Synonyms

• alert
• Argus-eyed
• attentive
• awake
• observant
• open-eyed
• tenty [Scottish]
• tentie
• vigilant
• wide-awake

Choose the Right Synonym for watchful

watchful, vigilant, wide-awake, alert mean being on the lookout especially for danger or opportunity.

watchful is the least explicit term.

the watchful eye of the department supervisor

vigilant suggests intense, unremitting, wary watchfulness.

eternally vigilant in the safeguarding of democracy

wide-awake applies to watchfulness for opportunities and developments more often than dangers.

wide-awake companies latched onto the new technology

alert stresses readiness or promptness in meeting danger or in seizing opportunity.

alert traders anticipated the stock market's slide

Examples of watchful in a Sentence

We need to be more watchful of our children.

The hotel is being built under the watchful eye of its architect.

Recent Examples on the Web

Jockeying under a watchful Eye Amid widespread speculation over who will be the next pope, theologians say the faithful look at pre-conclave jockeying as a chance for the divine to intervene in human matters. —Michael Loria, USA Today, 3 May 2025

China’s intelligence agency has also launched a very public campaign on social media over the last two years warning its citizens against spying for foreign nations and to keep a watchful eye out for espionage attempts. —Nectar Gan, CNN Money, 2 May 2025

The emergency was the latest in a years-long series of fiascoes within L.A. County’s juvenile halls — all of which have unfolded under the watchful eye of the California attorney general’s office. —James Queally, Los Angeles Times, 1 May 2025

The ragtag group joins together under the watchful eye of Valentina Allegra de Fontaine (Julia Louis-Dreyfus), a morally flexible private-sector spook who has been named the head of the CIA in the new film. —Eliana Dockterman, Time, 30 Apr. 2025

Word History

First Known Use

15th century, in the meaning defined at sense 1a

Phrases Containing watchful

• keep a watchful eye on (someone or something)
• under the watchful/vigilant eye of

Kids Definition

watchful

adjective

watch·​ful ˈwäch-fəl 

ˈwȯch-

: continually on the lookout especially for danger

watchfully

-fə-lē 

adverb

watchfulness noun