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Webster 1828 Edition

Adj.

Pertaining to Aaron, the Jewish High Priest, or to the priesthood of which he was the head.

Aaronic ‎(comparative more Aaronic, superlative most Aaronic)

Pertaining to Aaron. [First attested in the mid 17^th century.]
Pertaining to or characteristic of a high priest; priestly. [First attested in the mid 17^th century.]
(Mormonism) Of or pertaining to the lower order of priests. [First attested in the early 19^th century.]

pertaining to Aaron