1. Darkness resulting from the extinction of lights (as in a city invisible to enemy aircraft)
   "The coastal town practised blackouts during wartime";
   - brownout, dimout
    
2. The failure of electric power for a general region
   "The citywide blackout lasted for several hours"
    
3. A momentary loss of consciousness
   "He experienced a blackout during the intense heat of the marathon"
    
4. Partial or total loss of memory
   "he has a total blackout for events of the evening";
   - amnesia, memory loss
    
5. A suspension of radio or tv broadcasting
   "The station experienced a blackout during the severe weather"

1. Lose consciousness due to a sudden trauma, for example
   "She blacked out momentarily due to low blood sugar";
   - zonk out [informal], pass out, zonk [informal]
    
2. Darken completely
   "The dining room blacked out";
   - blacken out
    
3. Suppress by censorship as for political reasons
   "parts of the newspaper article were blacked out"

Derived forms: blacked out, blacks out, blacking out, blackouts

Type of: break, change state, cognitive state, dark, darken, darkness, edit, intermission, interruption, pause, power failure, power outage, redact, state of mind, suspension, turn, unconsciousness

Encyclopedia: Blackout, John Rocco