English edit

Etymology edit

yester- +‎ century

Adverb edit

yestercentury (not comparable)

  1. In the century preceding the current century.

Noun edit

yestercentury (uncountable)

  1. Previous century, the last century before the current one.
    • 1920 July, D. R. Piper, “Have we any user for creeds”, in Homiletic Review, volume 80, page 5:
      Yet the creeds of yestercentury remain.