: any of a class of often fragrant organic compounds that can be represented by the formula RCOOR′ and that are usually formed by the reaction between an acid and an alcohol with elimination of water
Examples of ester in a Sentence
Recent Examples on the Web
Keto supplements, including capsules, powders, and liquids, are more likely to contain ketone esters or salts.
—
Melissa Nieves, Verywell Health, 18 Mar. 2025
Malting enhances esters in the rye, producing lighter fruity notes of apple, pear, and even citrus zest.
—Joseph V Micallef, Forbes, 12 Dec. 2024
Each of these must be converted to retinoic acid, with retinyl esters being the weakest and retinal being the strongest.
—Jessica Swirble, Verywell Health, 19 Feb. 2025
Key Ingredients: Squalane, cholesterol esters, vitamin E, vitamin C, retinyl palmitate, Morinda citrifolia extract, and Padina pavonica.
—Kiana Murden, Vogue, 21 Feb. 2025
See All Example Sentences for ester
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Melissa Nieves, Verywell Health, 18 Mar. 2025
Malting enhances esters in the rye, producing lighter fruity notes of apple, pear, and even citrus zest.
—Joseph V Micallef, Forbes, 12 Dec. 2024
Each of these must be converted to retinoic acid, with retinyl esters being the weakest and retinal being the strongest.
—Jessica Swirble, Verywell Health, 19 Feb. 2025
Key Ingredients: Squalane, cholesterol esters, vitamin E, vitamin C, retinyl palmitate, Morinda citrifolia extract, and Padina pavonica.
—Kiana Murden, Vogue, 21 Feb. 2025
See All Example Sentences for ester
Cite this Entry
“Ester.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ester. Accessed 3 May. 2025.
Copy CitationKids Definition
ester
noun
es·ter
ˈes-tər 
: an organic compound formed by the reaction between an acid and an alcohol
Medical Definition
ester
noun
es·ter
ˈes-tər
: any of a class of often fragrant compounds that can be represented by the formula RCOOR′ and that are usually formed by the reaction between an acid and an alcohol usually with elimination of water
Love words? Need even more definitions?
Merriam-Webster unabridged
Share