1. (

• sodium_carbonate ,
• washing_soda ,
• sal_soda ,
• soda_ash ,
• soda

) a sodium salt of carbonic acid; used in making soap powders and glass and paper ;

2. (

• pop ,
• soda ,
• soda_pop ,
• soda_water ,
• tonic ,

) a sweet drink containing carbonated water and flavoring; "in New England they call sodas tonics" ;