son

One's male offspring.

A male adopted person in relation to his adoptive parents.

A male person who has such a close relationship with an older or otherwise more authoritative person that he can be regarded as a son of the other person.

A male person considered to have been significantly shaped by some external influence.

A male descendant.

A familiar address to a male person from an older or otherwise more authoritative person.

(UK, colloquial) An informal address to a friend or person of equal authority.

(computing) The current version of a file, derived from the preceding father file.