1. Instruction to go away
   "scram! I'm fed up with your nonsense";
   - get stuffed [Brit, informal], avaunt [archaic], beat it [informal], begone [literary], bog off [Brit, informal], bug off [N. Amer, informal], buzz off [informal], get lost [informal], shove off [informal], go away, naff off [Brit, slang], hop it [Brit, informal], leg it [informal], be off, get knotted [Brit, informal], run along [informal], sod off [Brit, informal], take a hike [informal]

1. Go away or leave immediately
   "Scram!";
   - buzz off [informal], push off [informal]
    
2. Perform an emergency shutdown of a nuclear reactor
   "They had to scram the reactor due to a coolant leak"

1. An emergency shutdown of a nuclear reactor
   "The operators initiated a scram when they detected abnormal readings"

Derived forms: scrams, scrammed, scramming

Type of: go away, go forth, leave, off [informal]

Encyclopedia: Scram