If you describe someone as lovely, you mean that they are friendly, kind, or generous. Laura is a lovely young woman She's a lovely child. = delightful
If you describe someone or something as lovely, you mean that they are very beautiful and therefore pleasing to look at or listen to. You look lovely, Marcia He had a lovely voice It was just one of those lovely old English gardens. = beautiful + loveliness love·li·ness You are a vision of loveliness. = beauty
If you describe something as lovely, you mean that it gives you pleasure. Mary! How lovely to see you! It's a lovely day What a lovely surprise! = marvellous, wonderful