- noun1. the state of being unsure of something• Hyponyms:↑mental reservation, ↑reservation, ↑arriere pensee, ↑misgiving, ↑mistrust, ↑distrust, ↑suspicion, ↑incredulity, ↑disbelief, ↑skepticism, ↑mental rejection, ↑indecision, ↑indecisiveness, ↑irresolution, ↑peradventure, ↑suspense2. uncertainty about the truth or factuality or existence of something-
the dubiousness of his claim-
there is no question about the validity of the enterprise• Derivationally related forms: ↑question (for: ↑question), ↑doubtful (for: ↑doubtfulness), ↑dubious, ↑doubt (for: ↑doubt)
Useful english dictionary. 2012.