big sister

American  

noun

1. an elder sister.

2. (sometimes initial capital letters) a woman who individually or as a member of an organized group undertakes to sponsor or assist a girl in need of help or guidance.

3. (sometimes initial capital letters) a young woman in the junior or senior class in college who advises a young woman in the freshman class on studies, social activities, etc., often as a part of a sorority program.

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Example Sentences

She seems like there’s a cool big sister hidden just under her nurse persona.

From Literature

Would they be glad to have a big sister or disappointed to lose a governess?

From Literature

“Like a big sister who everyone ignores when cooing over the new baby,” she scolded herself sternly.

From Literature

She added that the note was nothing more “than a little sister asking for prayers for her big sister.”

From Los Angeles Times

She is like the big sister to everyone - she knows what to do in stressful situations and handles things so smoothly.

From BBC