Progradation

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    The growth of a river delta farther out into the sea over time, as it gains more sediment countable, uncountable

Etymology

Formed as pro- + gradation, after prograde.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.