A superior is a person who has the authority to command another, as in "a superior officer". See: Superior (function)
In a hierarchical structure of any kind, a superior is higher in the hierarchy and thus closer to the apex than the subordinate ones. See: Superior (hierarchy)
Superior is the name of several places in the United States of America:
 

Superior is also the largest lake of the Great Lakes between the United States of America and Canada: see Lake Superior.

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