common evening primrose com·mo·ne·veningprimrose uncommon noun 1. a coarse biennial of eastern North America with yellow flowers that open in the evening; naturalized in Europe Synonymscommon evening primroseGerman rampionOenothera biennis Related words Broader terms evening primrose WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
