A sole male child among multiple siblings. / Used other than figuratively or idiomatically: see only, son.

plural of only son

plural of prodigal son

plural of natural son

(historical) Emperor of China

plural of native son

(Christian theology) The person (hypostasis) of the Trinity or Godhead corresponding to the Word of God, which became flesh—incarnated—in Jesus Christ, the only-begotten Son of God the Father.

(circumlocutory, obsolete) children of Ishmael

plural of son of a bitch

plural of son of a whore