vitamin
noun
vi·ta·min
ˈvī-tə-mən 
British usually
ˈvi-
: any of various organic substances that are essential in minute quantities to the nutrition of most animals and some plants, act especially as coenzymes and precursors of coenzymes in the regulation of metabolic processes but do not provide energy or serve as building units, and are present in natural foodstuffs or sometimes produced within the body
Examples of vitamin in a Sentence
This cereal contains essential vitamins and minerals.
Did you remember to take your vitamin?
Recent Examples on the Web
Tossing in spinach, broccoli, zucchini, mushrooms, peppers or tomatoes boosts fiber, vitamins and volume without adding many calories.
—
Lauren Jarvis-Gibson, Charlotte Observer, 18 May 2026
Across Target’s Wellness Ecosystem Under the broader umbrella of wellness, Target has built a $10 billion business in its health division— spanning personal care, over-the-counter meds, nutrition and vitamins and women’s health.
—Pamela N. Danziger, Forbes.com, 18 May 2026
Exercise and vitamins — there’s your headline.
—Yvonne Villarreal, Los Angeles Times, 18 May 2026
Many medical experts told me that the number of deaths directly attributed to vitamin K — fewer than a dozen annually — are only part of the story.
—Duaa Eldeib, ProPublica, 18 May 2026
See All Example Sentences for vitamin
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Lauren Jarvis-Gibson, Charlotte Observer, 18 May 2026
Across Target’s Wellness Ecosystem Under the broader umbrella of wellness, Target has built a $10 billion business in its health division— spanning personal care, over-the-counter meds, nutrition and vitamins and women’s health.
—Pamela N. Danziger, Forbes.com, 18 May 2026
Exercise and vitamins — there’s your headline.
—Yvonne Villarreal, Los Angeles Times, 18 May 2026
Many medical experts told me that the number of deaths directly attributed to vitamin K — fewer than a dozen annually — are only part of the story.
—Duaa Eldeib, ProPublica, 18 May 2026
See All Example Sentences for vitamin
Cite this Entry
“Vitamin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/vitamin. Accessed 22 May. 2026.
Copy CitationKids Definition
vitamin
noun
vi·ta·min
ˈvīt-ə-mən
: any of various substances that are necessary in very small amounts to the nutrition of most animals and some plants, that are important to the control of growth and development by activating and assisting in the function of enzymes, and that are present naturally in many foods or in some cases are produced within the body
Medical Definition
vitamin
noun
vi·ta·min
ˈvīt-ə-mən, British also ˈvit-
: any of various organic substances that are essential in minute quantities to the nutrition of most animals and some plants, act especially as coenzymes and precursors of coenzymes in the regulation of metabolic processes but do not provide energy or serve as building units, and are present in natural foodstuffs or are sometimes produced within the body
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