so·​di·​um | \ ˈsō-dē-əm How to pronounce sodium (audio) \

Definition of sodium

: 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 — see Chemical Elements Table

Examples of sodium in a Sentence

Recent Examples on the Web Current dietary guidelines recommend that adults consume no more than 2,300 milligrams of sodium per day. NBC News, 13 Oct. 2021 Plus, your kids will get a decade’s supply of sodium. Kate Sidley, The New Yorker, 4 Oct. 2021 Some scientists are researching developing new batteries out of sodium (from the sea) and sulfur (from industrial production), but those chemicals are much less stable. Eamon Barrett, Fortune, 29 Sep. 2021 Clouds of sodium intentionally released from the inert rocket stages that carried the probes confirmed the success. Anatoly Zak, Popular Mechanics, 18 July 2021 The sodium, for a man of my age and stature, is not good. Jonathan Cohen, Variety, 27 Sep. 2021 The beverage does not contain fat or cholesterol and has minimal amounts of protein and sodium. Serena Coady, Glamour, 21 July 2021 Try to stick with meals with less than 600 mg sodium per serving, Jones says. Marygrace Taylor, SELF, 10 June 2021 Don't add salt to your water because most frozen crab legs have already been boiled on the boat, so sodium has already been added. Tamara Gane, Southern Living, 8 June 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sodium.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of sodium

1807, in the meaning defined above

History and Etymology for sodium

New Latin, from English soda

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Learn More About sodium

Dictionary Entries Near sodium

so disposed


sodium alum

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Statistics for sodium

Last Updated

16 Oct 2021

Cite this Entry

“Sodium.” Dictionary, Merriam-Webster, Accessed 27 Oct. 2021.

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More Definitions for sodium



English Language Learners Definition of sodium

: a soft silver-white element that is found in salt, baking soda, and other compounds


so·​di·​um | \ ˈsō-dē-əm How to pronounce sodium (audio) \

Kids Definition of sodium

: a soft waxy silver-white chemical element occurring in nature in combined form (as in salt)


so·​di·​um | \ ˈsōd-ē-əm How to pronounce sodium (audio) \

Medical Definition of sodium

: 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

More from Merriam-Webster on sodium

Nglish: Translation of sodium for Spanish Speakers

Britannica English: Translation of sodium for Arabic Speakers Encyclopedia article about sodium


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