evangelical
adj.adj. describing a person or group with very strong beliefs, especially in a branch of Christianity that focuses on sharing the Bible's message. It can also describe anyone who is very excited to tell others about a new idea or product.
adj. relating to a tradition within Protestant Christianity that emphasises the authority of the Bible and the necessity of personal conversion. In a secular context, it describes a person characterised by militant zeal or enthusiasm for a particular cause.
He is an evangelical supporter of the new electric car technology.
The candidate spent the weekend visiting evangelical churches to secure the support of religious voters in the rural districts.
Often used to modify nouns like 'zeal', 'fervour', or 'Christianity'.