1. an acute and highly contagious viral disease marked by distinct red spots followed by a rash; occurs primarily in children
2. Leprosy; also, a leper.
3. A contagious febrile disorder commencing with catarrhal symptoms, and marked by the appearance on the third day of an eruption of distinct red circular spots, which coalesce in a crescentic form, are slightly raised above the surface, and after the fourth day of the eruption gradually decline; rubeola.