Wiktionary
overling
n. 1 (context rare English) A superior. 2 (context UK dialectal English) A ruler; master.
Usage examples of "overling".
I wrote my resignation on an overling slip and left it in the register.
The underling can humbly suggest, but only an overling can harshly request.
On the Moon, obligations between underlings and overlings had their strength, but it was the strength of a river, form and force incessantly changeable.