Definitions

gullible

[guhl-uh-buhl] / ˈgʌl ə bəl /

ADJECTIVE

naive, trusting

Synonyms

STRONGEST

foolish unsophisticated unsuspecting wide-eyed

WEAK

being a sucker believing biting credulous easily taken in easy mark falling hook line and sinker green innocent kidding oneself mark silly simple sucker susceptible swallowing whole taken in taking the bait trustful tumbling for unskeptical

Antonyms

WEAK

astute discerning knowledgeable perceptive suspicious unbelieving untrusting wise

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Professional and institutional investors turn positive on stocks at the beginning of a bull market, and gradually unload their appreciated equities to more gullible retail investors.

From MarketWatch • Mar. 25, 2026

Or is it more like Freddy Krueger, coming back to haunt the gullible?

From The Wall Street Journal • Mar. 22, 2026

Maybe I would have too — I’m really gullible.

From Los Angeles Times • Dec. 18, 2025

Ms Slinn added: "You just feel a bit stupid, don't you? You think 'how gullible can you be to give £5,000 to people you don't even know who they are?'."

From BBC • Apr. 3, 2025

Were they then both deposed masters of the galaxy and gullible puppets all at once?

From "Between the World and Me" by Ta-Nehisi Coates

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