Definition of disease

• n. - Lack of ease; uneasiness; trouble; vexation; disquiet.
• n. - An alteration in the state of the body or of some of its organs, interrupting or disturbing the performance of the vital functions, and causing or threatening pain and weakness; malady; affection; illness; sickness; disorder; -- applied figuratively to the mind, to the moral character and habits, to institutions, the state, etc.
• v. t. - To deprive of ease; to disquiet; to trouble; to distress.
• v. t. - To derange the vital functions of; to afflict with disease or sickness; to disorder; -- used almost exclusively in the participle diseased.