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 of watchful

• 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

At a celebratory exhibition match last week in the capital, under the watchful eye of the supreme leader, Naegohyang faced off against the under-17s team, who just added an Asian Cup to their impressive array of silverware, trouncing Japan 5-1 in the final. —Andrew McNicol, CNN Money, 7 June 2026

Eaton Canyon, at the base of the San Gabriel Mountains, has been closed to the public since the 2025 Eaton Fire, and regrowth is beginning to emerge, with watchful eyes monitoring its progress. —Joy Benedict, CBS News, 4 June 2026

One day, James, a watchful and solitary child, escapes his bitter family in a sweet peach that floats him away. —Literary Hub, 3 June 2026

The Oakland Police Department took a monumental step forward Wednesday in escaping the watchful eye of a federal judge for the first time since the infamous Riders scandal more than 20 years ago. —Jakob Rodgers, Mercury News, 28 May 2026

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