Definitions

1. noun

the visible part of the eye, including the cornea, iris, and retina

“She rubbed the sleep from her eyeball with her knuckle.”

2. noun

a person or thing that is of particular interest or attention

“The movie premiere was the main eyeball at the festival.”

3. verb

to look at something or someone with a particular expression

“The child eyeballed his parents, daring them to punish him.”