1. (n.) Concurrence.

2. (n.) A group of symptoms occurring together that are characteristic and indicative of some underlying cause, such as a disease.

abnormality acute disease affection affliction ailment allergic disease allergy atrophy bacterial disease birth defect blight cardiovascular disease chronic disease circulatory disease complaint complication condition congenital defect defect deficiency disease deformity degenerative disease disability disease disorder distemper endemic endemic disease endocrine disease epidemic disease functional disease fungus disease gastrointestinal disease genetic disease handicap hereditary disease iatrogenic disease ill illness indisposition infectious disease infirmity malady malaise morbidity morbus muscular disease neurological disease nutritional disease occupational disease organic disease pandemic disease pathological condition pathology plant disease protozoan disease psychosomatic disease respiratory disease rockiness secondary disease seediness sickishness sickness signs symptomatology symptomology symptoms the pip urogenital disease virus disease wasting disease worm disease