An unpopped kernel in a batch of popped popcorn kernels.
A card game in which cards must be paired and one undesirable card is designated "old maid".
An unpaired card in that game.
GNU Webster's 1913
(2 definitions)
See under Old.
A simple game of cards, played by matching them. The person with whom the odd card is left is the old maid.
WordNet
(5 definitions)
–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').
An elderly unmarried woman.
The loser in a game of old maid.
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.