What is "prearrangement"

Usage examples of "prearrangement".

Arly, by prearrangement, appeared in the doorway with a hardcopy file, and apologized profusely for interrupting.

They sent him by prearrangement: because in his very foreignness, his conspicuousness and seeming detachment, he could learn what Terrans might not.

They sent him by prearrangement: because in bis very foreignness, his conspicuousness and seeming detachment, he could learn what Terrans might not.

Something, a disinhibiting stimulus fired at the boy by his own prearrangement, would trigger anamnesis-the loss of amnesia, and all the memories would flood back: his conception on CY30-CY30B, the period in Rybys's womb as she battled her dreadful illness, the trip to Earth, perhaps even the interrogation.

But a code used between people required prearrangement, some line of communication already open.

What did you do-make prearrangements for them to come looking for you if you didn't report back in by a certain time?

Would there be any special equipment, or prearrangements that you require?