Transformation is the genetic alteration of a cell resulting from the introduction, uptake and expression of foreign DNA.
Transformation is also the process by which normal cells are converted into cells that will continue to divide without limit. Normal cells can divide only a certain number of times before they will stop dividing. Cells that have been transformed no longer have such a limit (for example, cancer cells) are able to grow and divide potentially forever.
In the terms of military operations, transformation is the process of transitioning to a lightweight, fast-moving force that heavily utilizes disambiguation page; that is, one that points to other pages that might otherwise have the same name. If you followed a link here, you might want to go back and fix that link to point to the appropriate specific page.