heat up
phrasal verb
heated up; heating up; heats up
1
: to become warm or hot
The morning started out cold but it heated up quickly.
2
: to become more active, intense, or angry
Their conversation started to heat up.
Competition between the two companies is heating up.
3
heat (something) up
or heat up (something)
: to cause (something) to become warm or hot
Could you heat up the vegetables, please?
Examples of heat up in a Sentence
Recent Examples on the Web
While the aging population has been an enduring investment theme over the past decade, the thesis is now heating up, analyst Ryan Daniels said in a note published Wednesday.
—
Michelle Fox, CNBC, 26 May 2025
Christopher Briney will be heating up our TVs when the Prime Video show’s final season premieres on July 16.
—Ana Calderone, People.com, 25 May 2025
The former probably won’t have any problems using an iron that takes a while to heat up.
—Bestreviews, Chicago Tribune, 23 May 2025
However, as current increases, transmission lines heat up and sag due to thermal expansion.
—Erik Kobayashi-Solomon, Forbes.com, 22 May 2025
See All Example Sentences for heat up
Examples are automatically compiled from online sources to
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Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
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Michelle Fox, CNBC, 26 May 2025
Christopher Briney will be heating up our TVs when the Prime Video show’s final season premieres on July 16.
—Ana Calderone, People.com, 25 May 2025
The former probably won’t have any problems using an iron that takes a while to heat up.
—Bestreviews, Chicago Tribune, 23 May 2025
However, as current increases, transmission lines heat up and sag due to thermal expansion.
—Erik Kobayashi-Solomon, Forbes.com, 22 May 2025
See All Example Sentences for heat up
Cite this Entry
“Heat up.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/heat%20up. Accessed 3 Jun. 2025.
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