concerning
Americanpreposition
adjective
preposition
adjective
Etymology
Origin of concerning
First recorded in 1375–1425; concern ( def. ) + -ing 2 ( def. )
Compare meaning
How does concerning compare to similar and commonly confused words? Explore the most common comparisons:
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.
In effect, Coxon lit a match to a growing pile of concerning developments that on their own didn’t capture the world’s attention.
From The Wall Street Journal ● Sep. 17, 2026
Yields of 5% may be taken in stride, but hitting 5.5% or 6% on the 10-year note would be more concerning, Sockin said.
From MarketWatch ● Sep. 16, 2026
"That's helpful in determining how we should be preparing. Is the threat imminent, or do we have six months? We're in a very concerning phase right now, and the tool backs that up."
From Science Daily ● Sep. 15, 2026
French drone company Harmattan AI separately signed a letter of intent with Iraq's defence ministry concerning autonomous air-defence systems.
From Barron's ● Sep. 14, 2026
What is concerning is the real possibility that we, as a society, will choose not to care.
From "The New Jim Crow" by Michelle Alexander
![]()
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.