A firstborn is the first child born to in the birth order of a couple through childbirth. Historically, the role of the firstborn child has been socially significant, particularly for a firstborn son in patriarchal societies.

What is eldest child meaning?

(eldɪst ) adjective. The eldest person in a group is the one who was born before all the others. The eldest child was a daughter called Fiona.

What does it mean to be the eldest?

: of the greatest age or seniority : oldest my eldest daughter.