Definitions

1. noun

A small, portable box or case used for carrying and storing small items, particularly musical instruments, such as a harmonica or a clarinet.

“She kept her harmonica in a cassinette to protect it from dust.”

2. noun

A small, ornate box or case used for storing and displaying small items, such as jewels or trinkets.

“The antique shop had a beautiful cassinette on display filled with antique brooches.”