1.AdjectiveRelieving the discomfort of gas in the digestive tract, either by reducing its production (by the gut microbiota) or by inducing its expulsion (whether as belches [upper GI action] or as flatus [lower GI action]).
2.NounA drug or substance that relieves the discomfort of gas in the digestive tract, either by reducing its production (by the gut microbiota) or by inducing its expulsion (whether as belches [upper GI action] or as flatus [lower GI action]).