IPA: /ˈlʌvər/
KK: /ˈlʌvər/
A person who loves someone, especially in a romantic or sexual way, or someone who is very fond of something.
She is his lover, and they have been together for several years.
Lover → It is formed from "love" (from Old English *lufu*, meaning deep affection or strong attachment) and "-er" (meaning a person who). A lover is a person who loves or has a deep affection for someone.
Think of someone who has a strong 'affection' ('love') for another person — that's what a lover is.