1. older sister; elder sister
usu. お姉さん
彼は君のお姉さんのことが好きだったのかな?I wonder if he liked your older sister.
3. miss
referring to a waitress, etc.; usu. お姐さん
4. ma'am
used by geisha to refer to their superiors; usu. お姐さん
5. older girl
近所のお姉さんに勉強を教えてもらった。An older girl from the neighborhood helped me study.