Ma'anar ƙamus na jimlar "canjin siffar" tana nufin aiki ko tsarin canza siffa ko kamannin wani abu. Yana iya haɗawa da canza abu daga wata siffa ko siffa zuwa wani, kamar lanƙwasa wani ƙarfe zuwa wata siffa daban, ko canza tsarin wani abu, kamar siffar gini ko siffar jikin wata halitta mai rai. Gabaɗaya, canjin siffa yana nuna gagarumin canji ga sifofin zahiri na abu ko tsarin.
