to be uncertain about; consider questionable or unlikely; hesitate to believe.

to distrust.

Archaic . to fear; be apprehensive about.

to be uncertain about something; be undecided in opinion or belief.

a feeling of uncertainty about the truth, reality, or nature of something.

distrust.

a state of affairs such as to occasion uncertainty.

Obsolete . fear; dread. ?

beyond the shadow of a doubt, with certainty; definitely. Also, beyond a doubt

beyond doubt.

in doubt

in a state of uncertainty or suspense

His appointment to the position is still in doubt.

no doubt

probably.

certainly

There is no doubt an element of truth in what you say.

without doubt

unquestionably; certainly.

noun

believer , truster

noun

agnostic , cynic , disbeliever , headshaker , questioner , skeptic , unbeliever , zetetic , doubting thomas , nonbeliever , thomas