doubtful - Definition in the Essential American English Dictionary - Cambridge Dictionaries Online

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English definition of “doubtful”

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doubtful

adjective
 
/ˈdɑʊt·fəl/
If something is doubtful, it probably will not happen: It’s doubtful whether he’ll be able to come.
not feeling certain about something: The teacher is doubtful about having parents working as classroom assistants.
(Definition of doubtful from the Websters Essential Mini Dictionary © Cambridge University Press)
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