What is the meaning of Sister?

A daughter of the same parents as another person; a female sibling.

A female member of a religious order; especially one devoted to more active service; a nun.

Any butterfly in the genus Adelpha, so named for the resemblance of the dark-colored wings to the black habit traditionally worn by nuns.

A senior or supervisory nurse, often in a hospital.

Any woman or girl with whom a bond is felt through the same biological sex, gender or common membership in a community, race, profession, religion, organization, or ism.

A black woman.

A form of address to a woman.

A woman, in certain religious, labour or socialist circles; also as a form of address.

An entity that has a special or affectionate, non-hierarchical relationship with another.

A node in a data structure that shares its parent with another node.

Something in the same class.

To strengthen (a supporting beam) by fastening a second beam alongside it.

To be sister to; to resemble closely.

Alternative form of suster

sister

Source: wiktionary.org