Meaning of land bridge

land' bridge"

Pronunciation: [key]
  1. an actual or hypothetical strip of land, subject to submergence, that connects adjacent continental landmasses and serves as a route of dispersal for plants and animals: a prehistoric land bridge between Asia and North America.
  2. a transcontinental rail route between countries, as those in Europe and the Far East, considered faster and less costly than all-sea routes.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.