An Etymological Dictionary of Astronomy and Astrophysics

1. To produce anew; bring into existence again; to bring new and more vigorous.
   

2. Biology: To renew or restore (a lost, removed, or injured part).
   

3. Physics: To restore (a substance) to a favorable state or physical condition.
   

4. Electronics: To magnify the amplification of, by relaying part of the output circuit power into the input circuit (Dictionary.com).

See also: → re-; → generate.