1. in a way that is difficult or impossible to believe
2. to an extreme degree; extremely
Usage: informal; used for emphasis

Examples

• The story he told was unbelievably far-fetched.
• She ran unbelievably fast in the race.
• The movie was unbelievably boring.
• It’s unbelievably cold outside today.
• The magician’s trick was unbelievably realistic.
• He was unbelievably rude to the waiter.
• The price of gas has risen unbelievably high.