- A sole male child among multiple siblings.
- 1991 November 18, Alessandra Stanley, “The Symbols Spawned by a Killing”, in New York Times:
- Mr. Doyle, an only son, grew up with the undivided attention of affectionate parents and two doting sisters.
- Used other than with a figurative or idiomatic meaning: see only, son.
- He was the only son to go to college.
sole male child