1. an international organization for people with high IQs
Usage: proper noun when referring to the organization
2. a table or altar
Usage: formal; ecclesiastical

Examples

• She qualified for Mensa membership with her exceptional test scores.
• The local Mensa chapter meets monthly to discuss puzzles and games.
• Only two percent of the population has an IQ high enough for Mensa.
• The priest approached the mensa to begin the ceremony.
• The ancient mensa was carved from a single block of marble.