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From Middle English roster, roostare, equivalent to roast +‎ -er. Same formation as roster, although the words have very different meanings.


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roaster (plural roasters)

  1. One who roasts food.
    • 2011, Ruth A. Johnston, All Things Medieval: An Encyclopedia of the Medieval World
      [] they [professional cooks] had as many as 25 helpers, such as saucerers, larders, roasters, pottagers, bakers, spicers, and fruiterers, not to mention spit turners and scullions.
  2. (cooking) A kitchen utensil used for roasting.
    Synonyms: roasting tin, roasting pan
  3. A chicken, pig, etc. suitable for roasting.
  4. A furnace used in making ball soda.
  5. One who roasts or banters, especially as a comedy routine.
    • 2009, Jeffrey Ross, I Only Roast the Ones I Love: Busting Balls Without Burning Bridges:
      There is nothing I would like more than for a young wise guy or wise gal to study my teachings and learn from my experiences in order to become America's next great roaster.
  6. (planetology, informal) A hot Jupiter.
  7. (Scotland, slang, derogatory) An objectionable person; somebody making a fool of themselves.