1. to remove from religious or spiritual influence or control; to make secular
2. to transfer from religious to civil or lay use, ownership, or control

Examples

• The government decided to secularize the education system.
• Many European countries secularized church properties during the 19th century.
• The reform movement aimed to secularize political institutions.
• They voted to secularize the hospital that had been run by nuns.
• The constitution helped secularize the legal system.
• Modern society tends to secularize traditional ceremonies.