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1. Oxford American Dictionary

   cracker

   • IPA[ˈkrakər]

   美式

   • n.
     a thin, crisp wafer often eaten with cheese or other savory toppings.；a person or thing that cracks.

   • noun: cracker, plural noun: crackers

2. • 釋義

   n.

   名詞

   • 1. a thin, crisp wafer often eaten with cheese or other savory toppings.
   • 2. a person or thing that cracks.
   • ▪ a person who breaks into a computer system, typically for an illegal purpose computer crackers will push the outer limits of network security
   • ▪ an installation for cracking hydrocarbons a catalytic cracker
   • 3. US offensive another term for poor white
   • 4. British informal a fine example of something don't miss this cracker of a CD
   • 5. British a paper cylinder that is pulled apart at Christmas or other celebrations, making a sharp noise and releasing a small toy or other novelty.
   • ▪ a firework that explodes with a sharp noise.