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Already the whole project was looking doubtful.
It is doubtful whether he will survive.
Kirkwood is doubtful for tonight's match.
You still seem a bit doubtful.
He was doubtful about the accuracy of the results.
The board was doubtful that her estimates were realistic.
documents of doubtful authenticity
This is the British English definition of doubtful. View American English definition of doubtful.
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View the pronunciation for doubtful.
American English version of definition of doubtful
a video advertisement that appears immediately before an online video
to use someone or something for your own purposes, often in a way that causes harm or difficulties
a rave … that takes place early in the morning and where there is no alcohol or drugs …
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Definition of doubtful from the online English dictionary from Macmillan Publishers Limited.