2.VerbTo undergo a deconversion from a religion, faith or belief or to induce (someone) to reject a particular religion, faith, or belief.
"She has deconverted from Christianity, Islam, Judaism, etc.; They tried to deconvert him."
3.VerbTo revert or to restore.
4.VerbTo change a building that has been converted to a new use back to its original use; specifically to change a house that has been converted into apartments or flats back to a single-family dwelling.