To envelop in a protective case.
To withdraw into such a case.
The silky protective case spun by the larvae of some insects in which they metamorphose, the pupa.
Any similar protective case, whether real or metaphorical.
Separated from others of the same kind.
Separate from a mass and collected together along lines of fraction.
Separate; select.
To separate, especially by social policies that directly or indirectly keep races or ethnic groups apart.