an elderly unmarried woman

any of various plants of the genus Zinnia cultivated for their variously and brightly colored flower heads

commonly cultivated Old World woody herb having large pinkish to red flowers

the loser in a game of 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’)