definition of
soda

[1] #1 soda n. [sodium carbonate, washing soda, sal soda, soda ash] a sodium salt of carbonic acid; used in making soap powders and glass and paper. wn

[2] #2 soda n. [pop, soda pop, soda water, tonic] a sweet drink containing carbonated water and flavoring; "in New England they call sodas tonics". wn