1. an unexpected or astonishing event, fact, or thing
2. a feeling of mild astonishment or shock caused by something unexpected

1. to cause someone to feel mild astonishment or shock
2. to encounter or discover someone or something unexpectedly

Examples

• The birthday party was a complete surprise.
• To my surprise, she remembered my name.
• The test results surprised everyone.
• We surprised them with an early visit.
• His reaction was no surprise to me.
• The storm surprised the campers.
• She looked up in surprise when I entered.