1. A stretch of shallow water
   "The boat ran aground in the shoal";
   - shallow
    
2. A sandbank in a stretch of water that is visible at low tide
   "The boat ran aground on an unexpected shoal"
    
3. A large group of fish
   "a shoal of small glittering fish swam by";
   - school

1. Make shallow
   "The silt shoaled the canal";
   - shallow
    
2. Become shallow
   "the lake shoaled over time";
   - shallow

Derived forms: shoaled, shoaling, shoals

Type of: alter, animal group, body of water, change, modify, sandbank, water

Encyclopedia: Shoal