Noun old maid has 5 senses
  1. spinster, old maid - an elderly unmarried woman
    --1 is a kind of unmarried woman
  2. zinnia, old maid, old maid flower - any of various plants of the genus Zinnia cultivated for their variously and brightly colored flower heads
    --2 is a kind of flower
    --2 is a member of genus Zinnia
    --2 has particulars:
     white zinnia, Zinnia acerosa; little golden zinnia, Zinnia grandiflora
  3. 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
    --3 is a kind of herb, herbaceous plant
    --3 is a member of Catharanthus, genus Catharanthus
  4. old maid - a person who is primly fastidious
    --4 is a kind of
    person, individual, someone, somebody, mortal, human, soul
  5. old maid - 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')
    --5 is a kind of
    card game, cards