something out of the common course.
EXTRAORDINARY Couriers, are those sent expressly on some urgent occasion.
EXTRAORDINARY Ambassador, or envoy, is such a one as is sent to treat or negotiate some special and important affair, as a marriage, a treaty, confederacy, &c., or even on occasion of some ceremony, as condolence, congratulation, &c.
A gazette, journal, or other newspaper extraordinary, is that published after some great and notable event, containing the detail or particulars thereof, which are not found in the ordinary papers.