1. (

• shoal ,

) a sandbank in a stretch of water that is visible at low tide ;

2. (

• shoal ,
• shallow

) a stretch of shallow water ;

3. (

• school ,
• shoal

) a large group of fish; "a school of small glittering fish swam by" ;

1. (

• shallow ,
• shoal ,

) make shallow; "The silt shallowed the canal" ;

2. (

• shallow ,
• shoal

) become shallow; "the lake shallowed over time" ;