any evergreen plant of the genus Dryas, of the rose family, growing in northern or alpine regions of the Northern Hemisphere and having showy, solitary, white or yellow flowers.
Origin of mountain avens
First recorded in 1790–1800
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for mountain avens
See avens (def. 2)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012