Definition of lump sugar in English:

lump sugar

noun

mass noun
  • Sugar in the form of small cubes.

    • ‘In Sugarcandy Mountain it is Sunday all week, clover is always in season, and lump sugar and linseed cake grow on the hedges.’
    • ‘Mollie tries to deny it, gets upset and gallops off - Clover goes to Mollie's stall and finds some lump sugar and ribbons hidden under the straw.’
    • ‘Saturate lump sugar with bitters in a thick tumbler or mug.’