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Synonyms

heat up

Idioms  
  1. Become acute or intense, as in If inflation heats up, the interest rate will surely rise, or The debate over the budget was heating up. [Early 1200s]


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Under the skylight of a 10-foot industrial ceiling is a cold, foreboding blacksmith’s forge — which, on an active day, would heat up to 2,500 degrees — surrounded by uncut, conical metal templates awaiting manipulation.

From Los Angeles Times • May 6, 2026

Have you ever felt your smartphone heat up after heavy use or watched the battery drop at the worst possible moment?

From Science Daily • May 3, 2026

As they are so much bigger when they heat up they create a flash and a line, often called a train, behind them.

From BBC • Apr. 15, 2026

While some tech stocks stalled, investors flocked to overlooked corners of the market, enticed by lower valuations and the idea that the economy would heat up.

From The Wall Street Journal • Mar. 31, 2026

My mother always wakes up early to heat up soup and eat with me while the rest of the family sleeps.

From "The Queen of Water" by Laura Resau

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