Definition of Lid

Noun: lid lid

Either of two folds of skin that can be moved to cover or open the eye
"his lids would stay open no longer";
- eyelid, palpebra
A movable top or cover (hinged or separate) for closing the opening at the top of a box, chest, jar, pan, etc.
"he raised the piano lid"
Headdress that protects the head from bad weather; has shaped crown and usually a brim
- hat, chapeau