1. (noun)spinster, old maid an elderly unmarried woman
2. (noun)zinnia, old maid, old maid flower any of various plants of the genusZinnia cultivated for their variously and brightly coloredflower heads
3. (noun)periwinkle, rose periwinkle, Madagascar periwinkle, old maid, Cape periwinkle, red periwinkle, cayenne jasmine, Catharanthus roseus, Vinca rosea commonly cultivated Old World woody herb having large pinkish to red flowers