eyeball I. \ˈ ̷ ̷ˌ ̷ ̷\noun Etymology:eye (I) + ball : the more or less globular capsule of the eye of vertebrates that is formed by the sclera and cornea together with its contained structures : the ball of the eye : the eye proper II. transitive verb slang: to look at intently or fixedly : stare at : eye < his triggermen huddled over a table in the corner, eyeballing me — Milton Mezzrow & Bernard Wolfe >