polar bear 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.
a large, white bear (Thalarctos maritimus) of coastal arctic regions, usually feeding on fish and seals
polar bear definition by American Heritage Dictionary
A large, white-furred bear (Ursus maritimus or Thalarctos maritimus) living in Arctic regions. Also called white bear.