1. a person who is not married or in a romantic relationship
2. something that occurs alone or consists of one member only
3. in card games, a card that is the only one of its suit in a player’s hand
Usage: card games

Examples

• As a singleton in her thirties, she enjoyed the freedom to travel whenever she wanted.
• The rare bird was a singleton, the only one of its species spotted in the area.
• He held a singleton spade, making it difficult to communicate with his partner.
• The programmer used a singleton pattern to ensure only one instance of the class existed.
• Among all her married friends, she was the only singleton at the dinner party.
• The museum’s collection included a singleton manuscript from the medieval period.
• Playing bridge, she worried about her singleton heart in the trump suit.