Three little sisters.
An example of sister is a girl who is born to your parents a year after you are born.
- a woman or girl as she is related to the other children of her parents: sometimes also used of animals
- a woman or girl related to one by having a parent in common; half sister
- a stepsister
- a foster sister
- a close female friend who is like a sister
- a female fellow member of the same race, church, profession, organization, etc.: a sorority sister
- Slang a fellow black who is female
- Slang a black woman or girl
- a member of a female religious community, usually one with simple vows: often a term of address
- something associated with another of the same kind, model, etc.
- Brit. a nurse, esp. a head nurse: often a term of address
- Informal any woman: often used as a familiar term of address
Origin of sisterMiddle English ; from Old Norse systir (akin to Old English sweoster from source dialect, dialectal suster), akin to German schwester ; from Indo-European an unverified form swesor-, sister (from source Sanskrit svasar, Classical Latin soror, Old Irish siur) ; from an unverified form sewe-, (one's) own, reflexive pronoun (see suicide) + an unverified form sor-, woman: hence, literally , woman of our (family)
- A female having the same parents as another or one parent in common with another.
- A girl or woman who shares a common ancestry, allegiance, character, or purpose with another or others, specifically:a. A kinswoman.b. A woman fellow member, as of a sorority.c. A fellow woman.d. A close woman friend or companion.e. A fellow African-American woman or girl.f. A woman who advocates, fosters, or takes part in the feminist movement.
- Informal Used as a form of address for a woman or girl.
- Abbr. Sr. Ecclesiastical a. A member of a religious order of women; a nun.b. Used as a form of address for such a woman, alone or followed by the woman's name.
- Chiefly British A nurse, especially the head nurse in a ward.
- One identified as female and closely related to another: “the sisters Death and Night” (Walt Whitman).
- Related by or as if by sisterhood; closely related: sister ships; sister cities.
- Genetics Of or being one of an identical, related, or homologous pair: sister chromatids.
Origin of sisterMiddle English, from Old Norse systir; see swesor- in Indo-European roots.
- Title of respect for an adult female member of a religious or fraternal order.
- Formal title for any female member of a religious or fraternal organization. (Compare Miss.)
- An informal title used as part of another moniker:
- Native American leader Chief Seattle urged ecological responsibility, referring to Brother Eagle and Sister Sky in his purported 1854 speech.