Definition of "preheating" []

• Present participle of preheat. (verb)

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• "Put the tray in the oven (you can even do this before the preheating is finished) and roast for 15 minutes plus whatever time is needed to finish preheating."
• "Things such as preheating the limestone before it hits the kiln save energy costs and much of the plant is automated."
• "Then after preheating the oven, and baking the loaf, we were rewarded with this: which we promptly slathered with butter and apricot jam."