What part of speech is the word secular?

The Word 'secular' is an adjective and a noun.

• The adjective 'secular' is a Word used to describe a noun asnot affiliated with a church or faith; as relating to or regulated by a state rather than affiliated with a religion.
• The noun 'secular' is a Word for a layperson; a Word for a clergyman who not ordained; a Word for someone or something that is not state or government affiliated; a Word for a person or a thing.