D defs.my
Entry 3 senses Webster, 1913

Thereby

/thĕr'-bī'/ · There·by · IPA /ðɛɹˈbaɪ/
01 adv. By that; by that means; in consequence of that.
  1. 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. 2.
    Annexed to that.
  3. 3.
    Thereabout; -- said of place, number, etc.