big sister
Americannoun
-
an elder sister.
-
(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.
-
(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.
The pregnancy had been far enough along to start getting their 4-year-old daughter excited about decorating a nursery, family-of-four camping trips and what it would mean to become a big sister.
From Salon • May 27, 2026
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
Affectionately called "big sister" by her teammates, she is leading a new generation of Japanese stars including Nakai, 17, and Chiba, 20.
From Barron's • Feb. 17, 2026
When Calvin’s big sister Evelyn would come home from college at Loyola Marymount University, they’d play board games for hours.
From Los Angeles Times • Dec. 17, 2025
Because if seventh grade is going to be hard, I need my big sister around.
From "P.S. I Miss You" by Jen Petro-Roy
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.
