secularize

1. To transfer from ecclesiastical or religious to civil or lay use or ownership.
2. To draw away from religious orientation; make worldly.
3. To lift the monastic restrictions from (a member of the clergy).

The verb has 2 meanings:

Meaning #1: make secular and draw away from a religious orientation
  Synonym: secularise

Meaning #2: transfer from ecclesiastical to civil possession, use, or control