Real Dictionary

sugar
uncountable noun: 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.

sugar in American English
any of a class of sweet, soluble, crystalline carbohydrates, as the disaccharides and the monosaccharides
to form sugar
to mix, cover, sprinkle, or sweeten with sugar
noun: a sweet, crystalline substance, C12H22O11, obtained chiefly from the juice of the sugarcane and the sugar beet, and present in sorghum, maple sap, etc.: used extensively as an ingredient and flavoring of certain foods and as a fermenting agent in the manu

sugar in British English
noun: a white crystalline sweet carbohydrate, a disaccharide, found in many plants and extracted from sugar cane and sugar beet: it is used esp as a sweetening agent in food and drinks. Formula: C12 H22 O11
noun: a white crystalline sweet carbohydrate, a disaccharide, found in many plants and extracted from sugar cane and sugar beet: it is used esp as a sweetening agent in food and drinks. Formula: C12H22 O11
noun: Alan (Michael). Baron. born 1947, British electronics entrepreneur; chairman of Amstrad (1968–2008); noted for his BBC series The Apprentice (from 2005)

sugar in Hospitality 1
noun: If someone has one sugar in their tea or coffee, they have one small spoon of sugar or one sugar lump in it.

sugar in Hospitality 2
noun: 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.