the GNU version of the Collaborative International Dictionary of English
preposition. before, shortly.
ad. Before the �apse of a long time; soon; -- usually separated, ere long.
The Century Dictionary and Cyclopedia
Before the lapse of a long time; before long; soon.
Word Usage
"At first it was a constant source of irritation and disgust to Corliss, but erelong he grew not only to tolerate it, but to like it, and to wait for it eagerly."