a. apt to believe on slight evidence; easily imposed upon; unsuspecting; believed too readily
They are credulous people who believe in the advertisement.
Sentence in Classic:
There was as yet nothing definable in the situation, which might well resolve itself into a huge joke on the part of the other two; but Lily had a vague sense that the subject of their experiment was too young, too rich and too credulous.
House of Mirth By Edith Wharton Context
For the second of welcome encounter this workman with the bandit mustache and the muddy overalls seemed nearer than any one else to the credulous youth which she was seeking to fight beside her, and she told him, as a cheerful anecdote, a little of her story.
Main Street By Sinclair Lewis Context
Nor, credulous as such minds must have been, was this conceit altogether without some faint show of superstitious probability.
Moby Dick By Herman Melville Context
As the credulous and excited traveler related the hazardous chances of the wilderness, the blood of the timid curdled with terror, and mothers cast anxious glances even at those children which slumbered within the security of the largest towns.
The Last of the Mohicans By James Fenimore Cooper Context
But there was less equivocal testimony, which the credulity of the assembly, or of the greater part, greedily swallowed, however incredible.