Definition of ‘Da’wah’:
‘Da’wah’ means an invitation. In the Islamic context it means an invitation to Islam. Thus Da’wah means conveying the message of Islam to non-muslims and inviting them to Islam.


Definition of ‘Islaah’:
‘Islaah’ means to improve, correct, rectify or repair. In Islamic terminology, ‘Islaah’ means correcting a muslim or providing more knowledge of Islam to a muslim.


Difference between Da'wah and Islaah:
Usually people use the word ‘Da’wah’ for the act of conveying the message of Islam, without differentiating whether the person being addressed is a muslim or a non-muslim. Many consider 'Da’wah' and 'Islaah' to be one and the same activity. The appropriate word used for inviting a non-muslim to Islam is 'Da’wah' and for providing correct and additional knowledge of Islam to a muslim is 'Islaah'.