: a colorless odorless flammable gaseous hydrocarbon CH4 that is a product of biological decomposition of organic matter and of the carbonization of coal, is used as a fuel and as a starting material in chemical synthesis, and is the simplest of the alkanes
Examples of methane in a Sentence
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Once on the methane moon, they were finally shown exactly what the job was.
—
Manuel Muñoz, Literary Hub, 11 Sep. 2025
The Environmental Protection Agency is proposing rolling back what's known as the endangerment finding, the basis for rules regulating climate pollution, including from coal and gas-fired power plants, cars and trucks, and methane from the oil and gas industry.
—Julia Simon, NPR, 11 Sep. 2025
The study also found these companies are responsible for 50% of the increase in heat wave intensity since before humans started adding so much planet-warming carbon and methane pollution to the atmosphere.
—Andrew Freedman, CNN Money, 10 Sep. 2025
Nine of the company’s Archimedes engines, fueled by liquid methane and liquid oxygen, will power the first stage skyward.
—Chris Young, Interesting Engineering, 8 Sep. 2025
See All Example Sentences for methane
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Manuel Muñoz, Literary Hub, 11 Sep. 2025
The Environmental Protection Agency is proposing rolling back what's known as the endangerment finding, the basis for rules regulating climate pollution, including from coal and gas-fired power plants, cars and trucks, and methane from the oil and gas industry.
—Julia Simon, NPR, 11 Sep. 2025
The study also found these companies are responsible for 50% of the increase in heat wave intensity since before humans started adding so much planet-warming carbon and methane pollution to the atmosphere.
—Andrew Freedman, CNN Money, 10 Sep. 2025
Nine of the company’s Archimedes engines, fueled by liquid methane and liquid oxygen, will power the first stage skyward.
—Chris Young, Interesting Engineering, 8 Sep. 2025
See All Example Sentences for methane
Cite this Entry
“Methane.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/methane. Accessed 14 Sep. 2025.
Copy CitationKids Definition
methane
noun
meth·ane
ˈmeth-ˌān 
: a colorless odorless flammable gas that consists of carbon and hydrogen and is produced by decay of organic matter
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