1. a confusing and difficult problem or question
2. a riddle whose answer involves a pun or play on words
Usage: traditional usage

Examples

• The budget crisis presents a real conundrum for the city council.
• How to reduce pollution while maintaining economic growth is a modern conundrum.
• The detective faced a conundrum when all the suspects had solid alibis.
• The ancient riddle was a clever conundrum about a door with no key.
• Balancing work and family time is a common conundrum for parents.
• The math problem proved to be quite a conundrum for the students.