WordWeb Online

1. Set lower
   - lower
    
2. Make lower or quieter
   - turn down, lower
    
3. Look angry or sullen, wrinkle one's forehead, as if to signal disapproval
   - frown, glower, lower[2]

Derived forms: lours, loured, louring

Type of: decrease, devalue, grimace, lessen, make a face, minify, pull a face