Adjective: firstborn 'furst'born- First in order of birth
"the firstborn child";
- eldest
Noun: firstborn 'furst'born- The offspring who came first in the order of birth
"As the firstborn, she felt responsible for her younger siblings";
- eldest
Derived forms: firstborns
See also: 1st, first
Type of: issue [formal], offspring, progeny
Encyclopedia: Firstborn