1. Geol.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. Also,land•bridgePronunciation: (land'brij"). [key]
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.