What is "seniorities"

Usage examples of "seniorities".

So Meg hadn't been happy where she'd been, so the Hamilton wouldn't let her right to the top of the pilot's list: you didn't get into that chair just walking aboard, Meg had to have known that, Meg must have known what to expect, coming in on a working crew with its own seniorities and its own way of doing things.

For purposes of getting along with other navies they assigned their personnel equivalent seniorities, but the fact of the matter was that not even the Tabbies truly understood how the consensual Gorm picked their military officers.