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Definition of firstborn

firstborn

/ˈfɜːrstˌbɔːrn/
first · born
Plural:firstborns
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firstborn Lexical Profile

firstborn Game Scores & Validity

• adjective

1

First in the order of birth; eldest among a parent's children or offspring.

Example

"Their firstborn son inherited the family estate in accordance with traditional custom."

Synonyms
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Antonyms
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• noun

1

The first child or offspring born to a parent or couple; the eldest child.

Example

"As the firstborn in a large household, she often helped look after her younger siblings."

Synonyms
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Antonyms
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• Nearby Words

firmness
firmware
first
firstborn
firstfruits
firsthand
firstly

Word Origin & Etymology

Formed in Middle English as a compound of 'first' and 'born', often used in early biblical translations to render the Latin 'primogenitus'.

Cite this Entry

Wordmom. (2026). Definition of Firstborn. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/firstborn
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