1
: a salt or ester of sulfuric acid
2
: a divalent group or anion SO4 characteristic of sulfuric acid and the sulfates
Examples of sulfate in a Sentence
Recent Examples on the Web
Conçetta Ciarlo, Vogue, 22 May 2025
These solids can include calcium, magnesium, chloride, sulfates, fluoride, and more.
—Halee Miller Van Ryswyk, Better Homes & Gardens, 21 May 2025
Randy Zellers, Field & Stream, 10 Apr. 2023
Energizing Scalp Serum for its gentle, sulfate-free formula.
—Rebecca Deczynski, Health, 30 Jan. 2023
See All Example Sentences for sulfate
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Noun
Best of all, this shampoo is free from all the bad stuff—no parabens, phthalates, silicones, sulfates, or synthetic colorants here.
—Conçetta Ciarlo, Vogue, 22 May 2025
These solids can include calcium, magnesium, chloride, sulfates, fluoride, and more.
—Halee Miller Van Ryswyk, Better Homes & Gardens, 21 May 2025
Verb
When the battery overheats, the water in the sulfuric acid solution within its case will boil and escape, leaving dry lead plates behind, which sulfate and lose their capacity.
—Randy Zellers, Field & Stream, 10 Apr. 2023
Energizing Scalp Serum for its gentle, sulfate-free formula.
—Rebecca Deczynski, Health, 30 Jan. 2023
See All Example Sentences for sulfate
Cite this Entry
“Sulfate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sulfate. Accessed 29 May. 2025.
Copy CitationMedical Definition
sulfate
2 of 2 transitive verb
variants
or chiefly British sulphate
sulfated or chiefly British sulphated; sulfating or chiefly British sulphating
: to treat or combine with sulfuric acid or a sulfate
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