Early 17th century; earliest use found in Francis Bacon (1561–1626), lord chancellor, politician, and philosopher. From im- + materiate, perhaps after post-classical Latin immateriatus.
Definition of immateriate in US English:
immateriate
adjectiveˌɪməˈtɪərɪeɪt
Philosophy rare
Not physical; incorporeal; = "immaterial".
Origin
Early 17th century; earliest use found in Francis Bacon (1561–1626), lord chancellor, politician, and philosopher. From im- + materiate, perhaps after post-classical Latin immateriatus.