Meaning ofcrackerin English

Noun

1. thin, crispy baked bread; savory or sweet
2. a type of explosive firework
3. holiday decorated tube with surprises
   The family opened a cracker on Christmas morning.
4. an excellent person or thing; superb
   She is a cracker at playing tennis and wins every match.
5. a computer security breaker (hacker)
   The company hired a specialist to prevent a cracker from stealing data.
6. person or device that cracks something
   A cracker is used to break open tough nuts for snacking.