From Longman Dictionary of Contemporary Englishicing sugarˈicing ˌsugar noun [uncountable] British English DFCvery fine light sugar that is mixed with liquid to make icing SYN powdered sugar American English
Examples from the Corpus
icing sugar• Try salt, ginger, icing sugar, chocolate or coffee.• Decorate with plain icing sugar mixed with water, or sprinkle ground ginger on top.• Beat in the icing sugar to make a stiff paste.• Leave the cookies to cool and harden on a wire rack. 5 Mix the icing sugar with two tablespoons of water.• For the filling, beat the butter with the icing sugar until light and fluffy, then beat in the chocolate liqueur.• On a surface lightly coated with icing sugar, shape chocolate mixture into finger-sized logs.• Dust with icing sugar and cinnamon and serve at once.• Sprinkle with icing sugar on top. 