Simple Definition of doubtful
: uncertain or unsure about something
: not likely to be true : not probable
: likely to be bad : not worthy of trust
Full Definition of doubtful
1 : giving rise to doubt : open to question <it is doubtful that they ever knew what happened>
2 a : lacking a definite opinion, conviction, or determination <they were doubtful about the advantages of the new system> b : uncertain in outcome : undecided <the outcome of the election remains doubtful>
3 : marked by qualities that raise doubts about worth, honesty, or validity <of doubtful repute>
doubtfullyplay \-fə-lē\ adverb
Examples of doubtful in a sentence
I tried to reassure them, but they remained doubtful.
The truth of the statements was doubtful.
Their decisions were based on data of doubtful accuracy.
First Known Use of doubtful
Synonym Discussion of doubtful
DOUBTFUL Defined for Kids
Definition of doubtful for Students
1 : undecided or unsure about something <I'm doubtful we'll make it on time.> <Minli was a little doubtful about riding the dragon. — Grace Lin, Where the Mountain Meets the Moon>
2 : not likely to be true <a doubtful claim>
3 : not likely to be good <doubtful quality>
4 : not certain in outcome <a doubtful future>
Seen and Heard
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