any plant of the genus Cistus or some allied genus, as Helianthemum.
any related plant.
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British Dictionary definitions for rockrose
any of various cistaceous shrubs or herbaceous plants of the Eurasian genera Helianthemum, Tuberaria, and Cistus, cultivated for their yellow-white or reddish roselike flowers
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