upper reaches
Noun
Meaning
upper reaches (uncountable)
(This entry is a translation hub.) The highest or most northerly extremes of something.
Synonyms
Examples
That Rathbun and Rinder are speaking out is a stunning reversal because they were among Miscavige's closest associates, Haldeman and Ehrlichman to his Nixon. Now they provide an unprecedented look inside the upper reaches of the tightly controlled organization.