noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   The hypothesis that humans first arose near the beginning of the Pleistocene, two million years ago, and subsequent human evolution has been within a single, continuous human species. uncountable

Etymology

From multiregional + -ism.

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