1. to have a firm persuasion, especially. Of the truths of religion; to have a persuasion approaching to certainty; to exercise belief or faith. Lord, i believe; help thou mine unbelief. (mark ix. 24) With the heart man believeth unto righteousness. (Rom. X. 10)
2. to think; to suppose. I will not believe so meanly of you. (Fielding) to believe in. to believe that the subject of the thought (if a person or thing) exists, or (if an event) that it has occurred, or will occur; as, to believe in the resurrection of the dead. She does not believe in jupiter. . to believe that the character, abilities, and purposes of a person are worthy of entire confidence; especially that his promises are wholly trustworthy. Let not your heart be troubled: ye believe in god, believe also in me. . to believe that the qualities or effects of an action or state are beneficial: as, to believe in sea bathing, or in abstinence from alcoholic beverages. to believe on, to accept implicitly as an object of religious trust or obedience; to have faith in.