Ma'anar ƙamus na kalmar "acid" na iya bambanta kaɗan dangane da mahallin, amma gaba ɗaya yana nufin wani sinadari mai ɗanɗano mai tsami da kuma ikon amsawa da wasu kayan, yawanci samar da ions hydrogen. A cikin ma'ana mafi girma, "acid" yana iya nufin wani abu mai kaifi, cizo, ko lalata a yanayi, kamar maganganun acidic ko wit acid. Bugu da ƙari, "acid" na iya nufin wani nau'in magani, kamar LSD ko wasu hallucinogens.