sweet ‧ ness /ˈswiːtnəs, ˈswiːtnɪs/ BrE AmE noun [uncountable]
[ Word Family: noun : ↑ sweet , ↑ sweetener , ↑ sweetness , ↑ sweetie ; verb : ↑ sweeten ; adverb : ↑ sweetly ; adjective : ↑ sweet ]
1 . how sweet something tastes or smells:
the sweetness of the wild rose
2 . how pleasant something is:
a smile of great sweetness
3 . be all sweetness and light
a) to behave in a way that is very pleasant and friendly, especially when you do not normally behave like this:
She’s all sweetness and light when Paul’s around.
b) to be enjoyable and without problems:
Life is not all sweetness and light.