Definition of dayflower
: any of a genus (Commelina) of herbs of the spiderwort family having one petal smaller than the other two; especially : a blue-flowered Asian herb (C. communis) with the smaller petal white that has become naturalized as a weed in the U.S.
First Known Use of dayflower
Learn More about dayflower
Britannica.com: Encyclopedia article about dayflower
Seen and Heard
What made you want to look up dayflower? Please tell us where you read or heard it (including the quote, if possible).