Wiktionary
a. Of something that has been assigned or allotted in advance.
Usage examples of "preassigned".
Up and out, she thought, and into the supposed safety of a preassigned orbit.
When the vessel reached Kzin, a priority orbit around the planet was preassigned it.
Republic task force, Shockers, and Sabers jump to preassigned coordinates on my mark.
Whitetip, as soon as the Ganiks began filing down the path from the shelf, Bili had all three hundred and twelve of his male and female warriors standing to arms in their preassigned places when the van of the Ganik mob came onto the crest of the first ridge.
Her crew, on hearing her directions, ran to their preassigned places around the missile.
He felt that he had lived a preassigned role and come to the end of it without an audience.
Either way, she would be sent back to her home universe to follow her preassigned patrol schedule for a while.
His well-drilled companions hurried to take up their preassigned positions around him.
When the big bomber reached its preassigned Initial Point, the bomb coordinator would have complete control of the aircraft.