To make a formal retraction or disavowal of (a statement or belief to which one has previously committed oneself).
To make a formal retraction or disavowal of a previously held statement or belief.
To withdraw or renounce (beliefs or statements formerly held), esp. in a formal or public manner.
To recant is to publicly take back something you said or to state that you no longer believe something in which you once believed.
When you say that you no longer hold the religious beliefs you did in the past, this is an example of a situation where you recant.