Sugar is a sweet substance that is used to make food and drinks sweet. It is usually in the form of small white or brown crystals.

If someone has one sugar in their tea or coffee, they have one small spoon of sugar or one sugar lump in it.

If you sugar food or drink, you add sugar to it.

Sugars are substances that occur naturally in food. When you eat them, the body converts them into energy.

If one person knows another person very well and likes them a lot, they sometimes call them sugar .