Definition & Meaning of "old maid"

a simple card game that is typically played with a standard deck of 52 cards by two or more players, in which the objective is to avoid being left with the unpaired "Old Maid" card at the end of the game

the loser in a game of old maid

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

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