DictionaryAI

gullible

SayGUL-i-buhl/ˈɡʌlɪbl̩/

2 meanings of gullible

Practice

  1. 1
    adjective
    Believing things too easily, so that people can trick you.

    My little brother is so gullible that he believed the moon was made of cheese.

    Don't be gullible: if a deal sounds too good to be true, it probably is.

    UsageSay gullible enough to believe it.

    Similarnaive, green

    Oppositeskeptical, wary, shrewd

Less common meaning

  1. 2
    noun
    Someone who believes things too easily and is easy to trick.
    Spurious accounts that snare the gullible are readily available. Skeptical treatments are much harder to find.
    1995, Carl Sagan, “The Most Precious Thing”

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Origin

The origin is not certain. It may come from gull, meaning “to trick”, plus -ible.

Checked 31 Oct 2026 · 2 facts