from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Subject to or causing doubt: a doubtful claim; doubtful prospects.
- adj. Experiencing or showing doubt: Doubtful that the cord would hold, we strengthened it.
- adj. Of uncertain outcome; undecided.
- adj. Raising doubts as to legitimacy, honesty, or respectability; suspicious: the candidate's doubtful past. See Usage Note at doubt.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Subject to, or causing doubt
- adj. Experiencing or showing doubt, sceptical
- adj. Undecided or of uncertain outcome
- adj. Fearsome, dreadful.
- adj. Improbable or unlikely
- adj. Suspicious, or of dubious character
- adj. Unclear or unreliable
from the GNU version of the Collaborative International Dictionary of English
- adj. Not settled in opinion; undetermined; wavering; hesitating in belief; also used, metaphorically, of the body when its action is affected by such a state of mind.
- adj. Admitting of doubt; not obvious, clear, or certain; questionable; not decided; not easy to be defined, classed, or named.
- adj. Characterized by ambiguity; dubious
- adj. Of uncertain issue or event.
- adj. Fearful; apprehensive; suspicious.
from The Century Dictionary and Cyclopedia
- Full of doubt; having doubt; not settled in opinion.
- Causing doubt; dubious; ambiguous; uncertain; not distinct in character, meaning, or appearance; vague: as, a doubtful expression; a doubtful hue.
- Admitting of or subject to doubt; not obvious, clear, or certain; questionable.
- Of uncertain issue; precarious; shifting.
- Of questionable or suspected character.
- Fearful; apprehensive; suspicious.
- Indicating doubt; disturbed by doubt.
- In prosody, variable in quantity; capable of being pronounced or measured either as a long or as a short; common; dichronous.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. open to doubt or suspicion
- adj. fraught with uncertainty or doubt
- adj. unsettled in mind or opinion
England instead of despotic Russia, it is doubtful if he could work out his discovery of the electrotype -- we say _doubtful_; for, as far as we can learn, it seems hitherto judicially undecided whether the mere use of a patent, not for sale or a lucrative object, is such a use within the statute of James as would be an infringement of a patentee's rights.
It all sounds like a bunch of meaningless numbers used to push a candidate whose qualifications still remain doubtful to this day.
I remain doubtful that society will ever produce parity enrollment between the genders in science and engineering.
I currently am in doubtful mode, but I am willing to see what comes of this mixture.
Loans that remain overdue for 91 days or more can be classified as substandard, while those overdue for a year to three years are classified as doubtful.
But the prospects for the fund remain doubtful due to a number of potential hurdles.
Shall we see hope and fear in doubtful conflict poised, shall we see misgivings, forebodings of ill throng in our pathway, shall clouds obscure and foes enlist and wrath
Hillary wins by 9% headlines – Hillary win doubtful, very suspicious, very sad
The fact that it was legally doubtful is irrelevant as long as it furthers the greater good of getting Republicans elected in Texas.
Some people insist on using only “natural” fibers, but “natural” is a term of doubtful meaning in this context as in so many others.
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