- a plant, Oenothera biennis, having yellow flowers that open at nightfall.
- any of various plants of the same or related genera.
Origin of evening primrose
First recorded in 1800–10
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for evening primrose
In another locality I might have brought him dwarf cornel, or the houstonia, or wood-sorrel, or the evening-primrose.Under the Maples
- any onagraceous plant of the genus Oenothera, native to North America but widely cultivated and naturalized, typically having yellow flowers that open in the evening
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