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1. Stem the flow of
   "shut off the gas when you leave for a vacation";
   - close off
    
2. Isolate or separate
   "She was shut off from the friends";
   - close off
    
3. Block off the passage through
   "We shut off the valve";
   - block off, close off

Derived forms: shutting off, shut off, shuts off

Type of: bar, barricade, block, block off, block up, blockade, cease, discontinue, divide, give up, lay off, quit, separate, stop, surcease [archaic]

Encyclopedia: Shut off