1. too great to be calculated or measured; immeasurably large
2. impossible to predict or determine in advance

Examples

• The hurricane caused incalculable damage to the coastal towns.
• Her contributions to medical research are of incalculable value.
• The number of stars in the universe is incalculable.
• The war brought incalculable suffering to millions of people.
• His reckless behavior could have incalculable consequences.
• The ancient library contained incalculable treasures of knowledge.
• The environmental impact of the oil spill was incalculable.