Me″di‐ate‐ly (?), adv. In a mediate manner; by a secondary cause or agent; not directly or primarily; by means; — opposed to immediately.
God worketh all things amongst us mediately. Sir W. Raleigh.
The king grants a manor to A, and A grants a portion of it to B. In this case. B holds his lands immediately of A, but mediately of the king. Blakstone.