old maid (n.)an elderly unmarried woman;
old maid (n.)any of various plants of the genus Zinnia cultivated for their variously and brightly colored flower heads;
Synonyms: zinnia /
old maid flower old maid (n.)commonly cultivated Old World woody herb having large pinkish to red flowers;
Synonyms: periwinkle /
rose periwinkle /
Madagascar periwinkle /
Cape periwinkle /
red periwinkle /
cayenne jasmine /
Catharanthus roseus /
Vinca rosea old maid (n.)the loser in a game of old maid;
old maid (n.)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');