(noun)
something that places in a higher-ranked category than something else in a system of classification, for example in linguistics, a broader word whose meaning includes one or more other words' meanings;
e.g. It can be useful to use a superordinate if you don't know the specific name for something.
(noun)
a person who holds a higher or more-superior rank in a hierarchy, especially within an organization, and who thus holds some control or authority over other people;
e.g. He consulted his superordinate before making his decision.