old maid

(noun) an elderly unmarried woman. Synonyms: spinster, old maid.

(noun) any of various plants of the genus Zinnia cultivated for their variously and brightly colored flower heads. Synonyms: zinnia, old maid, old maid flower.

(noun) commonly cultivated Old World woody herb having large pinkish to red flowers. Synonyms: periwinkle, rose periwinkle, Madagascar periwinkle, old maid, Cape periwinkle, red periwinkle, cayenne jasmine, Catharanthus roseus, Vinca rosea.

(noun) the loser in a game of old maid. Synonyms: old maid.

(noun) a card game using a pack of cards from which one queen has been removed; players match cards and the player holding the unmatched queen at the end of the game is the loser (or `old maid'). Synonyms: old maid.