baby sister

noun

A younger sister regardless of age.

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Meanings

nounbaby sister (plural baby sisters)

plural baby sisters

  1. informalA younger sister regardless of age.
  2. Used other than figuratively or idiomatically: see baby, sister.
Cite this entry
APA

baby sister. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/baby%20sister

MLA

“baby sister.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/baby%20sister. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “baby sister,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/baby%20sister.

Source: baby sister on Wiktionary, CC BY-SA 4.0.