blood sugar

noun

: the glucose in the blood

also : its concentration (as in milligrams per 100 milliliters)

Examples of blood sugar in a Sentence

As a diabetic, he needs his blood sugar to stay at the right levels.

Recent Examples on the Web

Medications to control blood pressure, cholesterol and blood sugar are also commonly used to slow disease progression while also protecting the heart and kidneys. — Daryl Austin, USA Today, 10 Aug. 2026

The representative said Lambert had not gotten enough sleep the previous night and had eaten little during the day, causing his blood sugar to drop. — Christina Dugan Ramirez, FOXNews.com, 9 Aug. 2026

In addition to balancing your blood sugar, snacking on apples with nut butter reduces hunger, too. — Kirsten Nunez, Martha Stewart, 8 Aug. 2026

Now, GLP-1s—originally created to help manage blood sugar levels for people with type 2 diabetes—have become a fixture of millions of Americans’ lives. — Emma Burleigh, Fortune, 7 Aug. 2026

Word History

First Known Use

1881, in the meaning defined above

Kids Definition

blood sugar

noun

: the glucose in the blood

especially : the amount or percentage of such sugar

Medical Definition

blood sugar

noun

: the glucose in the blood

also : its concentration (as in milligrams per 100 milliliters)