Eye/aɪ/ Definition 1 of 9Pro Tip 1/3Pair Usage Use 'eyes' to talk about both. 'Eye' is for one or any general reference to vision. His eyes twinkled. Pro Tip 2/3Eye Expressions Many expressions use 'eye' to describe emotions like happiness or suspicion. She had a spark in her eye. Pro Tip 3/3Physical Description Often used to describe someone's appearance, highlighting eye color or shape. He has piercing green eyes.