Lover (noun)

1. A person who has a romantic or sexual relationship with another.
2. A person who is fond of or has a strong liking for something.
3. A person who is passionate about a particular subject.

Origin:

Middle english: from old french, from latin amator, from amare "to love".

Examples:

1. She is his lover and they have been together for two years.
2. He is a lover of books and spends his evenings reading.
3. She is a lover of nature and often goes hiking.
4. He is a lover of classical music and attends concerts frequently.
5. She is a lover of fine wine and knows a lot about different types and regions.