Definition of: soda

(sō′də) noun
1. Any of several white alkaline compounds widely used in medicine, industry, and the arts, especially sodium bicarbonate (baking soda), sodium carbonate, sodium hydroxide, and sodium oxide.
2. Soda alum.
3. Soda salts.
4. Soda water; also, a soft drink containing carbonated water, flavoring, and, sometimes, ice-cream.
5. In faro, the first card to appear face up in the dealing box before the start of play. [<Med. L <Ital. soda (cenere) solid (ash) <L solidus]