FIRSTBORN
Meaning of FIRSTBORN in English
first ‧ born /ˈfɜːstbɔːn $ ˈfɜːrstbɔːrn/ BrE AmE noun [singular]
your first child
—firstborn adjective :
her firstborn son
Longman Dictionary of Contemporary English.
Longman - Словарь современного английского языка.
2012