Meaning of supercontinent

su•per•con•ti•nent

Pronunciation: (s"pur-kon'tn-unt), [key]
— n. Geol.
  1. a hypothetical protocontinent of the remote geologic past that rifted apart to form the continents of today. Cf.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.