sugar

A sweet crystalline or powdered substance, white when pure, consisting of sucrose obtained mainly from sugar cane and sugar beets and used in many foods, drinks, and medicines to improve their taste.

Any of a class of water-soluble crystalline carbohydrates, including sucrose and lactose, having a characteristically sweet taste and classified as monosaccharides, disaccharides, and trisaccharides.

A unit, such as a lump or cube, in which sugar is dispensed or taken.

Sweetheart. Used as a term of endearment.

To coat, cover, or sweeten with sugar.