big sister
Americannoun
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an elder sister.
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(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.
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(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.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
What she found was that the relationship went beyond business; she sees her agent as part negotiator, part therapist, part big sister.
From The Wall Street Journal • Mar. 4, 2026
She paid tribute to Sakamoto who is affectionately called "big sister" by her teammates.
From Barron's • Feb. 20, 2026
She is like the big sister to everyone - she knows what to do in stressful situations and handles things so smoothly.
From BBC • Sep. 20, 2025
The family said that Harper's little sister "adored her big sister and is grieving an unimaginable loss".
From BBC • Aug. 28, 2025
Friendship jail, or in this case, big sister jail.
From "Patina" by Jason Reynolds
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
