on high

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.

The Pasadena community was on high alert Friday after a mountain lion was spotted lounging near an elementary and middle school and a packed graduation ceremony, officials said.

From Los Angeles Times • Jun. 6, 2026

That was clearly not the case this quarter, but we remain on high alert.”

From MarketWatch • May 28, 2026

But weeks went by with no response from the tech companies and no sign of who might be sending her those messages - as Krug lived in abject fear, constantly on high alert.

From BBC • May 22, 2026

As pertinent as stupidity is another human tendency, to be unable to remain permanently on high alert.

From The Wall Street Journal • May 14, 2026

The KGB, which guarded the USSR's borders and kept watch over foreigners and Soviet citizens alike, was on high alert.

From "Spies: The Secret Showdown Between America and Russia" by Marc Favreau