What does word loveness mean?

"Loveness" isn't a standard English word. It's likely a misspelling or a made-up word.

If you meant "love", it's a strong feeling of affection and care for someone or something.

If you meant "loveliness," it refers to the quality of being beautiful, charming, or pleasing.

If you can provide more context about where you encountered this word, I might be able to help you understand its meaning.