old maid

Meanings

1. 1
   noun An old woman who has never married; a spinster.
2. 2
   noun The Madagascar periwinkle.
3. 3
   noun The common zinnia.
4. 4
   noun An unpopped kernel in a batch of popped popcorn kernels.
5. 5
   noun A card game in which cards must be paired and one undesirable card is designated "old maid".
6. 6
   noun The unmatchable card in that game.