The right for a
magazine or other periodical
publishing entity to publish an
author's
work in one of its
volumes. The author
restricts the publisher to publish the work
one time only; and that the work may be published in
North America, only. If the publisher wants to reprint, or to publish the work internationally, the author must be paid again.
I presume that there are other terms that are used outside of the United States; but this one is pretty popular in the US.