dietary

American  

[dahy-i-ter-ee] / ˈdaɪ ɪˌtɛr i /

adjective

1. of or relating to diet.

   a dietary cure.

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noun

plural

dietaries

1. a regulated allowance of food.

2. Obsolete. a system or course of diet.

dietary British  

/ ˈdaɪətərɪ, -trɪ /

adjective

1. of or relating to a diet

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noun

1. a regulated diet

2. a system of dieting

Other Word Forms

• dietarily adverb
• predietary adjective

Etymology

Origin of dietary

1400–50; late Middle English dietarie system of diet. See diet ¹, -ary

Example Sentences

The organization released new nutrition guidance that advises getting protein from plants rather than meat, contradicting dietary guidelines from the health secretary.

From The Wall Street Journal • Apr. 3, 2026

The findings could help doctors give clearer dietary guidance to patients.

From Science Daily • Apr. 3, 2026

The approach applies to items marketed and labeled as dietary supplements and provided to insurance beneficiaries under the direction of a physician.

From Barron's • Apr. 2, 2026

Like the new federal dietary guidelines released back in January, the document cautions against processed foods and refined sugars.

From Los Angeles Times • Mar. 31, 2026

He doesn’t care about their dissertation topics, or their dietary restrictions, or the color of their walls.

From "The Namesake" by Jhumpa Lahiri