1. makes universal or general in application; broadens the scope or appeal of something
Usage: British spelling (American: catholicizes); third-person singular present tense
2. converts to Catholicism or brings under Catholic influence or doctrine
Usage: British spelling (American: catholicizes); third-person singular present tense; often capitalized when referring to the Roman Catholic Church

Examples

• The new policy catholicises the benefits across all departments.
• The organization catholicises its mission to reach a broader audience.
• He catholicises the principles of the faith in his teachings.
• The movement catholicises traditional practices for modern times.
• She catholicises the appeal of classical music to younger generations.