Word.ws English Dictionary

baby sister

baby sister noun: a younger sister regardless of age.

Noun

baby sister (plural baby sisters)

  1. (informal) A younger sister regardless of age.
  2. Used other than figuratively or idiomatically: see baby, sister.

Forms of baby sister

pluralbaby sisters

Questions about baby sister

What does baby sister mean?
Baby sister means a younger sister regardless of age.
What part of speech is baby sister?
Baby sister is a noun.
What is the plural of baby sister?
The plural of baby sister is baby sisters.

Words near baby sister in the dictionary

  1. baby seats
  2. baby shampoo
  3. baby shampoos
  4. baby shower
  5. baby showers
  6. baby sister
  7. baby sitter
  8. baby sitters
  9. baby sitting
  10. baby sittings
  11. baby sling

Source and license

Adapted from Wiktionary: baby sister (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “baby sister.” Word.ws, https://word.ws/baby_sister. Based on Wiktionary, CC BY-SA 4.0.