Kalmar “tabbatuwa” ba a saba samun ta a yawancin ƙamus, amma ana iya fahimtar ta a matsayin nau’in suna na ma’anar “assured,” wanda ke nufin tabbatacce, tabbatacce, ko garanti. Don haka, “tabbas” ana iya ma’anarsa a matsayin inganci ko yanayin tabbatarwa, amincewa, ko tabbas game da wani abu. Yana nuna ma'anar gaskatawa ko imani cewa wani abu gaskiya ne ko zai faru kamar yadda ake tsammani, ba tare da shakka ko shakka ba.