firstborn
noun
The first child to be born to a parent or family.
Example sentence
- “He's the firstborn child.”
Related words
newbornA recently born baby.inlawOne who is within the domain or protection of the law.babyA very young human, particularly from birth to a couple of years old or until walking is fully mastered.godparentA person who, at a child's naming ceremony or baptism, agrees to help raise the child, originally and especially in regard to their religious development.kidA child, adolescent, or (loosely) a young adult.goddaughterA female child whose baptism is sponsored by a godparent.