1.
legitimate son; male heir; eldest legitimate son
The eldest son born to the legal wife, who has the right of succession. A historical and legal term often encountered in discussions of Japanese feudal history, samurai families, and inheritance.
Usage
嫡男 is primarily a historical term associated with the Japanese feudal system, where the eldest son of the principal wife had the right of succession. It appears frequently in historical dramas, period novels, and discussions of samurai lineage.