1
general::
Soon, in the near future, as in The baby will be teething before long. This idiom was first recorded in 1865.
American Heritage Idioms
2
general::
Phrase(s): before long
soon. • Billy will be grown-up before long. • If we keep spending so much, before long we’ll be without any money.
McGrawhill's American Idioms And Phrasal Verbs