the state of being unsure of something
"I have a healthy dose of doubt about whether we can finish the project before the deadline."
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"
Disbelief or uncertainty (about something); (countable) a particular instance of such disbelief or uncertainty.
"The crowd's collective doubt about the candidate's honesty made it impossible for him to secure any new endorsements."
In plain English: Doubt is when you are not sure if something is true or will happen.
"I have no doubt that he will arrive on time."
Usage: Use "doubt" as a noun to express a feeling of uncertainty or disbelief about a fact or claim. You can refer to a single specific instance of this uncertainty by adding a number, such as "one doubt" or "many doubts."
consider unlikely or have doubts about
"I doubt that she will accept his proposal of marriage"
lack confidence in or have doubts about
"I doubt these reports"
"I suspect her true motives"
"she distrusts her stepmother"
To be undecided about; to lack confidence in; to disbelieve, to question.
"After hearing all the conflicting reports, I find myself doubting whether he actually saw what we were told happened."
In plain English: To doubt something means to not believe it is true or to think there might be a problem with it.
"I have no doubt that she will finish the project on time."
Usage: Use doubt as a transitive verb when you directly question the truth or ability of something, such as doubting his story or doubting her skills. Do not use it with "if" or "whether," which are incorrect structures that often confuse learners; instead, simply state what you are questioning.
The word doubt comes from the Middle English douten and Old French douter, which ultimately trace back to the Latin verb dubitāre meaning "to be uncertain." While its earliest roots remain unclear, one theory suggests it evolved from a term related to "two," reflecting the idea of wavering between options.