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

Antibiotics are still used to treat TB, including isoniazid, the drug that began in a secret trial at Sea View Hospital under the watchful eye of the Black Angels. —Emilie Le Beau Lucchesi, Discover Magazine, 8 Feb. 2025

Aid workers and volunteers scrambled to collect dead bodies off the streets under the watchful eye of M23 patrols. —Monika Pronczuk and Justin Kabumba, Los Angeles Times, 8 Feb. 2025

Temporarily housing Gazans in dignified conditions elsewhere while the devastated territory is rebuilt under the watchful eyes of America and its allies would provide the Gazan people with much-deserved relief while depriving Hamas of its source of power and income. —Yair Rosenberg, The Atlantic, 5 Feb. 2025

Around the world, thousands of aircraft communicate successfully under the watchful eye of security, control, and regulation organizations. —Steve Wright, TIME, 4 Feb. 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