The American Heritage® Dictionary of the English Language, 4th Edition
n. Any of several plants of the genera Lychnis and Silene native chiefly to the Northern Hemisphere and having variously colored flowers with notched or fringed petals.
the GNU version of the Collaborative International Dictionary of English
n. A plant of the Pink family (Cucubalus bacciferus), bearing berries regarded as poisonous.
The Century Dictionary and Cyclopedia
n. The popular name of certain plants belonging to the genera Lychnis and Silene (which see).
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. any plant of the genus Silene
Word Usage
"I used the red-flowered or day-campion, which is a perennial herb, and a smooth variety of the white evening-campion, which flowers as a rule in the first summer."