Definition of Old Testamentism in English:
Old Testamentism
noun
rare
The religious doctrine of the Old Testament; excessive or inappropriate adherence to such doctrine.
Origin
Early 20th century; earliest use found in The Spectator. From Old Testament + -ism.
Pronunciation
Old Testamentism
/ˌəʊl(d) ˈtɛstəm(ə)ntɪz(ə)m/