day lily is a noun meaning "any of numerous perennials having mounds of sumptuous broad ribbed leaves and clusters of white, blue, or lilac flowers; used as ground cover". It carries 2 recorded senses.
any of numerous perennials having mounds of sumptuous broad ribbed leaves and clusters of white, blue, or lilac flowers; used as ground cover
any of numerous perennials having tuberous roots and long narrow bladelike leaves and usually yellow lily-like flowers that bloom for only a day
Definitions, synonyms and semantic relations for day lily come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.