ME'DIATELY, adverb By means or by a secondary cause, acting between the first cause and the effect. God worketh all things amongst us mediately by secondary means. 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.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI