GNU Collaborative International Dictionary of English

Found 3 definitions

1.       
   Scram (skrăm), v. i. [imp. & p. p. Scrammed (?); p. pr. & vb. n. Scramming (?).] to leave; to go away; used mostly as an impolite command to a person to go away from a specific location. [informal]
   
   [PJC]
   
   
         
       

2.       
   Scram (skrăm), v. t. [imp. & p. p. Scrammed (?); p. pr. & vb. n. Scramming (?).] to shut down (a nuclear reactor) quickly, as in an emergency.
   
   [PJC]
   
   
         
       

3.       
   Scram (skrăm), n. the rapid shut down of a nuclear reactor, as in an emergency.
   
   [PJC]