An undecided, inquiring state of mind; doubt; uncertainty.
The doctrine that no fact or principle can be certainly known; the tenet that all knowledge is uncertain; Pyrrohonism; universal doubt; the position that no fact or truth, however worthy of confidence, can be established on philosophical grounds; critical investigation or inquiry, as opposed to the positive assumption or assertion of certain principles.
A doubting of the truth of revelation, or a denial of the divine origin of the Christian religion, or of the being, perfections, or truth of God.
an attitude that doubts all claims not supported by solid research evidence. (34)
The doctrine that true knowledge is uncertain or impossible.
the view that all knowledge is beyond reasonable proof. Skepticism ranges from a complete doubt of everything, to a tentative doubt in a process of reaching certainty.
doubt about the truth of something
The reasoning of one who doubts the possibility of knowledge of reality; the systematic doubt which characterizes a philosophic skeptic.
belief that nothing can ever be known beyond all doubt and that humanity's best hope was open-minded toleration. (p. 607)
To doubt, question, or suspend judgment on philosophical and/or religious issues. In a strict philosophical sense, to deny that true knowledge is attainable.