Definitions for "Fitrah"
nature, (natural) disposition, (innate) character, moral constitution, temper, instinct, primitiveness, creation , origination , by nature, by birth, innately, congenitally, connately.
the natural state of man, which is Islam.
A person's pure state of being before it is corrupted by outside influences. This term is commonly attributed to young children, and those new converts to Islam who have just made their shahada.