noun
firstborn
FURST-bawn
noun
1
The first child born into a family.
"Their firstborn arrived two weeks early."
adj
1
Born first among siblings.
"As the firstborn son, he inherited the family farm."
How to Use Firstborn
Learner’s notesIn plain EnglishThe eldest child in a family.
Common pairings
firstborn child
firstborn son
Word Forms
firstborn plural, firstborns plural
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Their _____ arrived two weeks early.
Etymology
From first and born.