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
• vigilant
• awake
• careful

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

Monitor weather conditions via radar or lightning app. Keep a watchful eye on the sky. —Dinah Voyles Pulver, USA Today, 26 June 2025

Once back in Chicago and under the watchful, concerned eye of her mother Ronnie (Anji White), Riri gets recruited by Parker Robbins (Anthony Ramos), the leader of a local heist crew that targets the area’s multimillionaires. —Alison Herman, Variety, 25 June 2025

Also entering the Villa for compatibility challenges and matchups under the watchful eye of Perfect Match host Nick Lachey is Clayton Echard (The Bachelor), Rachel Recchia (The Bachelorette), Cody Wright (Temptation Island), Daniel Perfetto (Dated & Related) and The Mole alum Hannah Burns. —Etan Vlessing, HollywoodReporter, 25 June 2025

The official synopsis for the season, as per Hulu, reads: Glamorous singles live in a beautiful villa under the watchful gaze of the audience at home, who have the power to decide who stays and who goes. —Billie Melissa, MSNBC Newsweek, 19 June 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