There*by" (?), adv.
1.
By that; by that means; in consequence of that.
Acquaint now thyself with him, and be at peace; thereby good shall come unto thee.
Job xxii. 21.
2.
Annexed to that.
"
Thereby hangs a tale."
Shak.
3.
Thereabout; -- said of place, number, etc.
Chaucer.
© Webster 1913.