The silence lengthened until it became acute, epochal, climactic.
The 1914 catalogue was epochal in the life of this big farmer.
In 1868, Westinghouse made his epochal invention, the railway air-brake.
Historians recognize two epochal events in the life of the nation.
But in the future they will be regarded as epochal in the science of mind.
Then one epochal day, emulating ...