1. by that means or because of that; - Example: "He knocked over the red wine, thereby ruining the table cloth"
The Collaborative International Dictionary of English v.0.48:
Thereby \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.
2. Annexed to that. "Thereby hangs a tale." --Shak.
3. Thereabout; -- said of place, number, etc. --Chaucer.
WordNet (r) 3.0 (2006):
adv 1: by that means or because of that; "He knocked over the
red wine, thereby ruining the table cloth"
Moby Thesaurus II by Grady Ward, 1.0:
20 Moby Thesaurus words for "thereby":
by, by dint of, by means of, by use of, by virtue of, by way of,
hereby, herewith, in virtue of, on, per, thanks to, therefrom,
therewith, through, upon, whereby, wherewith, wherewithal, with