Lorelei definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
Gmc. Folklore a siren whose singing on a rock in the Rhine lures sailors to shipwreck on the reefs: originally a character in literature
Origin: German altered by C. Brentano (1778-1842), German poet, after Lurlei, name of the rock (prob. literally , “ambush cliff”) ; from Middle High German luren, to watch, lower plush lei, a cliff, rock
Lorelei definition by American Heritage Dictionary
A siren of Germanic legend whose singing lures sailors to shipwreck.