What is the meaning of Doubt?

To be undecided about; to lack confidence in; to disbelieve, to question.

To harbour suspicion about; suspect.

To anticipate with dread or fear; to apprehend.

To fill with fear; to affright.

To dread, to fear.

Disbelief or uncertainty (about something); a particular instance of such disbelief or uncertainty.

A point of uncertainty, especially a yes/no or a multiple-choice question

Source: wiktionary.org