Definition of cocoon
1 a
:an envelope often largely of silk which an insect larva forms about itself and in which it passes the pupa stage
b
:any of various other protective coverings produced by animals
2 a
:something suggesting a cocoon especially in providing protection or in producing isolation
- wrapped in a cocoon of blankets
- an interest in the world beyond the everyday cocoon most of us construct
- —Peter Mayle
b
:a protective covering placed or sprayed over military or naval equipment in storage
