old maid flower is a noun meaning "any of various plants of the genus Zinnia cultivated for their variously and brightly colored flower heads". It carries one recorded sense.
any of various plants of the genus Zinnia cultivated for their variously and brightly colored flower heads
Definitions, synonyms and semantic relations for old maid flower come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.