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1. Droop, sink, or settle from or as if from pressure or loss of tautness
   - droop, swag, flag
    
2. Cause to sag
   "The children sagged their bottoms down even more comfortably";
   - sag down

1. A shape that sags
   "there was a sag in the chair seat";
   - droop

Derived forms: sagged, sags, sagging

Type of: depression, drop, drop down, impression, imprint, sink

Encyclopedia: Sag, Ivan