Ma'anar ƙamus na "bambancin yau da kullum" yana nufin canje-canje ko sauyin da ke faruwa a kullum. Ana iya amfani da shi don bayyana kowane nau'in bambancin ko karkacewa da ke faruwa akai-akai ko akai-akai a cikin sa'o'i 24. Ana amfani da wannan kalmar a fannoni kamar kimiyya, kuɗi, da yanayin yanayi don bayyana sauyin yau da kullun ko sauye-sauyen da ake samu a cikin al'amura daban-daban, kamar zafin jiki, farashin hannun jari, ko yanayin yanayin halitta.