- by or through that; by that means
- connected with that: thereby hangs a tale
- Archaic thereabouts
Thereby is defined as because of something.
An example of thereby is when someone signed a confession and were then put in jail; they confessed thereby they are in jail.
- By that means; because of that.
- In connection with that: “And thereby hangs a tale” ( Shakespeare )
- (formal) By it, by that.
- "Who are Rita and Tamara?" he asked, thereby identifying his mystery amour.
- The settlement which he thereby imposed was in many ways excellent; but it was dearly purchased by the complete ascendancy of Bonaparte in all important affairs, and by the claim for the services of a considerable contingent of Swiss troops which he thereafter rigorously enforced.
- The Belgian government endeavoured by reducing rates and increasing facilities to stimulate inland telegraphy in the hope of thereby increasing the profits of the department.
- The Police didn't buy it and both were arrested, thereby renewing Howie's credibility.
- The crop is modified into a large and very rugose triturating apparatus, while the gizzard, thereby relieved of its function, is reduced to the utmost.