I. ˌin-tər-ˈmē-dē-ˌer-ē adjective
Date: 1788
1. : intermediate
2. : acting as a mediator
an intermediary agent
an intermediary particle
II. noun
( plural -ar·ies )
Date: 1791
1.
a. : mediator , go-between
b. : medium , means
2. : an intermediate form, product, or stage