An affectionate term used to show kindness and warmth towards someone, often a friend or loved one.
When people use "sweetie" it's usually as a friendly way to address someone they care about. They might call their partner "sweetie" when they're feeling particularly loving, or use it to soften an opinion they're about to share that might be hard for the other person to hear. It's often used in informal settings and can come across as a little old-fashioned, but it's also a way of showing genuine affection without being too sappy or mushy.
(often as a term of address) A person who is much loved.
