alertness

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Studies show that doses as low as 40mg-60mg may improve mood and alertness in middle-aged adults who normally consume little or no caffeine.

From Science Daily • May 13, 2026

Some did their exercises at times to match their body clock chronotype - the natural predisposition to morning or evening alertness - while others did the opposite.

From BBC • Apr. 14, 2026

Researchers considered it a promising option because it can promote alertness for extended periods without significantly disrupting later sleep.

From Science Daily • Apr. 1, 2026

They do so by irritating the linings of the nose and lungs, triggering a reflex that increases breathing rate and blood flow, fostering alertness.

From Los Angeles Times • Jan. 12, 2026

Zooey had turned toward her with somewhat menacing alertness.

From "Franny and Zooey" by J. D. Salinger