Abuse refers to the use or treatment of something (a person, item, substance, concept, or vocabulary) that's seen as harmful. Several types of abuse include: Spiritual abuse: abusive or aberrational practices identified in the behavior and teachings of some churches, spiritual and religious organizations and groups. Sexual abuse: The improper use of another person for sexual purposes, generally without their consent or under physical or psychological pressure (also, child sexual abuse, whethe… (More on Abuse)