2 definitions found From WordNet (r) 2.0 [wn]: acidic adjective 1: being or containing an acid; of a solution having an excess of hydrogen atoms (having a pH of less than 7) [ant: {alkaline}, {amphoteric}] 2: tasting sour like acid [syn: {acidulent}, {acidulous}] From The Collaborative International Dictionary of English v.0.44 [gcide]: Acidic \A*cid"ic\, adjective (Min.) 1. Containing a high percentage of silica; -- opposed to {basic}. 2. of or relating to acid; having the character of an acid, as an acidic solution. [PJC]

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