Soda water Meaning, Definition & Usage

  1. noun effervescent beverage artificially charged with carbon dioxide
    seltzer; sparkling water; club soda; carbonated water.
  2. noun a sweet drink containing carbonated water and flavoring
    tonic; soda pop; pop; soda.
    • in New England they call sodas tonics

WordNet

Definitions
  1. originally, a beverage consisting of a weak solution of sodium bicarbonate, with some acid to cause effervescence; now, in common usage, a beverage consisting of water highly charged with carbon dioxide (carbonic acid). Fruit sirups, cream, etc., are usually added to give flavor. See Carbonic acid, under Carbonic.

Webster 1913