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>
Examples of doubtful
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
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