Definition of "supercontinent"

supercontinent

noun
plural supercontinents
1. (geology) A very large continent that split into smaller ones in the Earth’s geologic past.
  Quotations
  For a supercontinent to form requires a significant volume of continental crustal fragments that survive recycling into the mantle.
  2001, Kent C. Condie, Mantle Plumes and Their Record in Earth History, Cambridge University Press, page 237
2. A modern landmass composed of multiple continents, i.e. Afro-Eurasia or the Americas.