The difference between Red-hot and White-hot
When used as adjectives, red-hot means heated to the point that it glows with a visible red color, whereas white-hot means hot enough to glow with a bright white light.
check bellow for the other definitions of Red-hot and White-hot
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Red-hot as an adjective:
Heated to the point that it glows with a visible red color.
Examples:
"The smith's apprentice was still wary of manipulating the red-hot metal."
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Red-hot as an adjective (hyperbolic):
very hot
Examples:
"that curry was red-hot"
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Red-hot as an adjective:
Emotionally charged, especially with anger or enthusiasm.
Examples:
"He really delivered a red-hot speech today."
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Red-hot as an adjective:
Having a very strong sexual appeal.
Examples:
"Did you see that red-hot picture of Liv Tyler in today's paper?"
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Red-hot as an adjective:
Very fresh, new, recent and up to date.
Examples:
"Tune in at ten to catch this red-hot story!"
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Red-hot as a noun (dated, US):
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White-hot as an adjective:
Hot enough to glow with a bright white light.
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White-hot as an adjective (by extension):
Extremely fervid or zealous.
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White-hot as an adjective:
Blazing.