Meaning

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

  "My sister is always driving me crazy."

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

  "Michelle left behind her bank job and became a sister at the local convent."

• 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 common membership of a race, profession, religion or organization, such as feminism.

  "Connie was very close to her friend Judy and considered her to be her sister."

• (sometimes capitalized) A black woman.

• A form of address to a woman.

  "What’s up, sister?"

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

  "Thank you, sister. I would like to thank the sister who just spoke."

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

  "sister city"

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

• (usually attributively) Something in the same class.

  "sister facility"