n 1  :  an organ of sight : esp  :  a nearly spherical hollow organ that is lined with a sensitive retina, is lodged in a bony orbit in the skull, is the vertebrate organ of sight, and is normally paired  2  :  all the visible structures within and surrounding the orbit and including eyelids, eyelashes, and eyebrows  3  :  the faculty of seeing with eyes eye*less adj eye*like adj 
 
 
 
Published under license with Merriam-Webster, Incorporated.  © 1997-2024.