1
: a silver-white soft waxy ductile element of the alkali metal group with atomic number 11 that occurs abundantly in nature in combined form and is very active chemically see Chemical Elements Table
2
: salt sense 1a, sodium chloride
—not used technically
reduced her sodium intake
a low-sodium diet
Examples of sodium in a Sentence
Recent Examples on the Web
Liquid sodium has excellent heat transfer properties, allowing the reactor to operate at higher thermal efficiency and lower internal pressures.
—
Aman Tripathi, Interesting Engineering, 17 May 2026
Some research has also associated high-sodium diets with a greater risk of stomach cancer, possibly due to damage of the stomach lining.
—Daryl Austin, USA Today, 16 May 2026
Because pickle brine contains large amounts of sodium, it is also reported to be a favorite amongst athletes during competition.
—Kait Hanson, Southern Living, 16 May 2026
In one study, researchers found that people with higher sodium levels had more severe nasal congestion and higher antibody levels.
—Mark Gurarie, Verywell Health, 15 May 2026
See All Example Sentences for sodium
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Aman Tripathi, Interesting Engineering, 17 May 2026
Some research has also associated high-sodium diets with a greater risk of stomach cancer, possibly due to damage of the stomach lining.
—Daryl Austin, USA Today, 16 May 2026
Because pickle brine contains large amounts of sodium, it is also reported to be a favorite amongst athletes during competition.
—Kait Hanson, Southern Living, 16 May 2026
In one study, researchers found that people with higher sodium levels had more severe nasal congestion and higher antibody levels.
—Mark Gurarie, Verywell Health, 15 May 2026
See All Example Sentences for sodium
Cite this Entry
“Sodium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sodium. Accessed 18 May. 2026.
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Medical Definition
sodium
noun
so·di·um
ˈsōd-ē-əm 
: a silver white soft waxy ductile element of the alkali metal group that occurs abundantly in nature in combined form and is very active chemically
—symbol Na
see Chemical Elements Table
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