In many parts of the U.S., soda is a sweet, fizzy drink. There are also some places where you'd call soda "pop," a "soft drink," or "Coke" instead.

While you may think of soda as something you order to drink at a restaurant, soda is also used for unflavored carbonated water, or seltzer, and for baking soda, or sodium bicarbonate. There's also sodium carbonate, or "washing soda," which is an ingredient in powdered soap and used to make some types of glass. This kind of soda was originally used to carbonate water, which led to the use of soda to mean "carbonated drink."

Definitions of soda
  1. noun
    a sweet drink containing carbonated water and flavoring
    synonyms: pop, soda pop, soda water, tonic
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    type of:
    soft drink
    nonalcoholic beverage (usually carbonated)
  2. noun
    a sodium salt of carbonic acid; used in making soap powders and glass and paper
    synonyms: sal soda, soda ash, sodium carbonate, washing soda
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    type of:
    a compound formed by replacing hydrogen in an acid by a metal (or a radical that acts like a metal)
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