To the best of my recollection there's no way to move a build definition, but you can copy it from one project area to another, so accomplishes the same basic goal.
Claude MOUREY selected this answer as the correct answer
FORUM ADMINISTRATOR / FORUM MODERATOR / JAZZ DEVELOPER(63.9k●3●36●48)Apr 30 '15, 10:15 a.m.
In the new Project Area, create a new build definition, select "From Existing Build definition" (or something along that line) and select the one you want to use.
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