firstborn

adjective

first·​born ˈfərs(t)-ˈbȯrn How to pronounce firstborn (audio)
: first brought forth : eldest
firstborn noun

Examples of firstborn in a Sentence

Recent Examples on the Web
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After years of rumors about when King Charles will hand the throne to his firstborn son, Prince William, well-wishers may finally have their answer. Jason Pham, StyleCaster, 2 Mar. 2026 So obviously, Anthony, the firstborn boy, honoring his father makes a lot of sense. Jennifer Maas, Variety, 26 Feb. 2026 The Hell's Kitchen actress welcomed her firstborn via adoption as a single mom in 2002; Pitt formerly adopted Maddox some years later. Emma Banks, InStyle, 26 Feb. 2026 The plagues included: The slaying of the firstborn sons of Egypt: The Bible explains that after ignoring all of Moses' warnings, God killed all of the firstborn sons of all the Egyptian families in the land. Seth Jacobson, wickedlocal.com, 19 Feb. 2026 See All Example Sentences for firstborn

Word History

First Known Use

14th century, in the meaning defined above

Time Traveler
The first known use of firstborn was in the 14th century

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Cite this Entry

“Firstborn.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/firstborn. Accessed 10 Mar. 2026.

Kids Definition

firstborn

adjective
first·​born ˈfərs(t)-ˈbȯ(ə)rn How to pronounce firstborn (audio)
: born first : eldest
firstborn noun

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