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.
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
"You were a constant, a guiding force, and to me, someone I admired and learned from - like a big sister, a woman of immense heart, wisdom, and generosity."
From BBC ● Mar. 25, 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
In this week’s episode of The Envelope podcast, the “Sentimental Value” star reflects on growing up onscreen and following in big sister Dakota Fanning’s footsteps.
From Los Angeles Times ● Feb. 26, 2026
Ivy's big sister and, well, whoever that is with her...
From "The School for Whatnots" by Margaret Peterson Haddix
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.
