Self-inductance is the property of the current-carrying coil that resists or opposes the change of current flowing through it.
This occurs mainly due to the self-induced emf produced in the coil itself. In simple terms, we can also say that self-inductance is a phenomenon where there is the induction of a voltage in a current-carrying wire.
Thus, The phenomenon in which emf is induced in a coil due to a change in the current of the coil is known as self-induction.