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1. Plan where and when songs should be inserted into a theatrical production, or plan a theatrical production in general
    
2. Prevent from entering
   "block out the strong sunlight";
   - screen
    
3. (photography) shield from light
   - mask
    
4. Indicate roughly
   - sketch out

Derived forms: blocked out, blocks out, blocking out

Type of: adumbrate, block, close up, cover, impede, jam, lay out, obstruct, obturate, occlude, outline, sketch

Encyclopedia: Block out