Definition of "weathervane" []

• A device for indicating wind direction. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "McCain has simply decided that his political weathervane is advising him to walk in goose-step with the conservative leadership within the GOP."
• "Today, the nation's weathervane is pointing unmistakably in the direction of the Republican Party."
• "Just before the plane left the runway there was a gust of 52 mph that, hitting the plane's tail, caused it to "weathervane" - turn until its nose was pointed into the wind, investigators said."