not amicable; not friendly or kindly in disposition; unsympathetic; aloof: an unfriendly coldness of manner.
hostile; antagonistic: an unfriendly act of aggression.
unfavorable; inhospitable or inimical, as an environment: an unfriendly climate for new ideas.
in an unfriendly manner.
- un·friend·li·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use unfriendly in a sentence
Winter on the Qinghai-Tibetan Plateau is unfriendly to pikas.Pikas survive winter using a slower metabolism and, at times, yak poop | Jonathan Lambert | July 19, 2021 | Science News
Open field tests are useful for calibrating such a technology, but the drone will need to work in much more acoustically unfriendly environments to truly function as a rescue tool.This drone can detect human screams. What could go wrong? | Rob Verger | June 23, 2021 | Popular-Science
There are also unfriendly, unwelcoming, and even hostile environments specifically for BIPOC members of our community.A New Crowdsourcing App Hopes to Serve as the 'Green Book' for LGBTQ People of Color | Madeleine Carlisle | May 18, 2021 | Time
Over the years Rudin has also targeted press he deems unfriendly, blocking access on his projects to reporters who have published stories, sometimes many years before, that Rudin thought did not treat him fairly.
“Our country’s intelligence leaders have made it clear that putting Americans’ sensitive information in the hands of unfriendly foreign governments is a major risk to national security,” Wyden said in a statement.Wyden urges ban on sale of Americans’ personal data to ‘unfriendly’ foreign governments | Drew Harwell | April 15, 2021 | Washington Post
All right, so we know that Loestrin and its ilk are, as Redmond terms it, “hair-unfriendly pills.”Birth Control Made My Hair Fall Out, and I’m Not the Only One | Molly Oswaks | October 14, 2014 | THE DAILY BEAST
Delays in our assistance are interpreted as deeply unfriendly, especially when Egypt is facing an insurgency in the Sinai.Let's Get Real: Washington Can't Walk Away From Cairo | Frank G. Wisner | May 26, 2014 | THE DAILY BEAST
Upon arrival, Ai and his assistant were greeted by some very unfriendly cops.
One of her most pointed criticisms is that people on the folk scene weren't as unfriendly as the film paints them.
The $400 million website devoted to signing up Americans in search of insurance has become a user-unfriendly nightmare.
I've grown used to seeing you, to having you with me all the time, and your action seems unfriendly, even unkind.The Awakening and Selected Short Stories | Kate Chopin
But Frank had already bought two tickets, and it seemed unfriendly to turn back now.Cabin Fever | B. M. Bower
The forest had become suddenly unfriendly; its kindliness had somehow vanished.Blazed Trail Stories | Stewart Edward White
Here was a man who stood four square to the winds, undisturbed by the cyclonic outbursts of unfriendly newspapers.A Hoosier Chronicle | Meredith Nicholson
My reader shall laugh at her; my unfriendly critic shall sneer at her.It Is Never Too Late to Mend | Charles Reade
British Dictionary definitions for unfriendly
not friendly; hostile
unfavourable or disagreeable
rare in an unfriendly manner
- unfriendliness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012