symptom /ˈsɪm(p)təm/ noun2 •A perceived change in some function, sensation or appearance of a person that indicates a disease or disorder, such as fever, headache or rash; strictly, a symptom is felt or experienced by the patient, while a sign can be detected by an observer.The doctor told that his coughing and sneezing was the symptom of standing for too long in the rain.Swollen breasts, morning sickness, and a missed period are classic symptoms of pregnancy. •(figurative) A signal; anything that indicates, or is characteristic of, the presence of something else, especially of something undesirable.Lying, hiding one's true feelings, and having affairs are typical symptoms of a doomed marriage. formssymptoms