big sister

• 有血缘关系的姐姐；也用来称呼或描述对年幼者承担保护、引导或照顾角色的女性。

An older female sibling, or a term used to describe a girl or woman who acts in a protective, guiding, or nurturing role towards a younger person.

1. Older female siblingA1formal

   A female sibling who is older than the person being referred to.

   姐姐

   • My big sister taught me how to ride a bike.
   • She is a protective big sister to her younger brother.
   • I always looked up to my big sister when I was a child.

2. Mentor or protectorB1informal

   A woman who acts as a guide, protector, or role model for someone younger or less experienced.

   大姐或保护者

   • She became a big sister to the new interns at work.
   • In the club, older members act as big sisters to newcomers.
   • He considers her his big sister because she always gives him good advice.