means A removable cover that fits over the opening of a container, pot, jar, or box to seal or protect its contents.

from An old Germanic word, surviving in Old English as 'hlid,' meaning a cover or door — a cousin of Dutch 'lid' and German 'Lid' (now 'eyelid'). At its root sits the idea of leaning or laying something over an opening, the same sense that gives us a 'lid' for a pot and an eye-'lid' for the eye: both are coverings that fold shut over what lies beneath.