A lid is a cover or seal, usually one that completely closes the object.

Lids have been found on pottery dating back as far as 3100 BC.

Often a part of a living creature covering an opening is called a lid. The word has other usages for things that cover something. It is used metaphorically, as in "keeping the lid on the secret."

Seals (mechanical)

Couvercle | 蓋 | Deksel