harmattan 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 dry, dusty wind that blows from the Sahara in N Africa toward the Atlantic, esp. from Nov. to March
Origin: Spanish harmatán ; from the native (Twi) name in western Africa
harmattan definition by American Heritage Dictionary
A dry dusty wind that blows along the northwest coast of Africa.
Origin: Akan (Twi) haramata, possibly from Arabic ḥarām, evil thing, from ḥarama, to prohibit; see ḥrm in Semitic roots.