belief рдХреНрдпрд╛ рд╣реИрдВ? belief рдХреНрдпрд╛ рд╣реИрдВ? The mental act, condition, or habit of placing trust or confidence in another: My belief in you is as strong as ever. Mental acceptance of and conviction in the truth, actuality, or validity of something: His explanation of what happened defies belief. Something believed or accepted as true, especially a particular tenet or a body of tenets accepted by a group of persons.