noun (n)

• an elderly unmarried woman(noun.person)

  Synonym:
  spinster
  

  source: wordnet30
• any of various plants of the genus Zinnia cultivated for their variously and brightly colored flower heads(noun.plant)

  Synonym:
  old maid flower, zinnia
  

  source: wordnet30
• commonly cultivated Old World woody herb having large pinkish to red flowers(noun.plant)

  Synonym:
  cape periwinkle, catharanthus roseus, cayenne jasmine, madagascar periwinkle, periwinkle, red periwinkle, rose periwinkle, vinca rosea
  

  source: wordnet30
• the loser in a game of old maid(noun.person)

  source: wordnet30
• 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')(noun.act)

  source: wordnet30