unfavorable or antagonistic in purpose or effect: adverse criticism.
opposing one's interests or desire: adverse circumstances.
being or acting in a contrary direction; opposed or opposing: adverse winds.
opposite; confronting: the adverse page.
- ad·verse·ly, adverb
- ad·verse·ness, noun
- un·ad·verse, adjective
- un·ad·verse·ness, noun
- adverse , averse (see usage note at the current entry)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use adverse in a sentence
The “plastic” antibodies saved mice from cobra venom, and healthy mice that received them had no adverse reactions, the team reported in PLOS Neglected Tropical Diseases.Cheap, innovative venom treatments could save tens of thousands of snakebite victims | Christie Wilcox | September 19, 2020 | Science News
The company said there had been no serious adverse reactions among any of those receiving the vaccine.China’s Sinovac plans to test COVID vaccine on children before the company is sure the inoculation works in adults | Grady McGregor | September 18, 2020 | Fortune
Between 2015 to 2019, health-care professionals, patients, and manufacturers filed nearly 2,500 reports to the FDA about an adverse reaction to an excipient.The ‘inactive' ingredients in your pills could harm you | By Yelena Ionova/The Conversation | September 15, 2020 | Popular-Science
So far, Sinopharm reports that no one who has received its vaccines through the emergency program has experienced obvious adverse effects, and none have been infected with Covid-19.China has quietly vaccinated more than 100,000 people for Covid-19 before completing safety trials | Lili Pike | September 11, 2020 | Vox
If the vaccine caused the illness — known as a serious adverse event — it could spell the end for AstraZeneca’s vaccine hopes.Here’s what pausing the AstraZeneca-Oxford coronavirus vaccine trial really means | Aimee Cunningham | September 9, 2020 | Science News
“Any time you put a foreign substance into anybody you have the potential for an adverse event,” Geisbert reminds.
I think it's good that it doesn't look like there was any serious adverse event, I mean, nobody was hospitalized.
Human trials of the Ebola vaccine have been temporarily shut down due to adverse side effects.
However, just because a vaccine is replication-defective does not mean that you won't have an adverse event.
For the individual patient, there is the potential for side effects or adverse reactions.Without Education, Antibiotic Resistance Will Be Our Greatest Health Crisis | Russell Saunders | December 19, 2014 | THE DAILY BEAST
At last his anxiety reached a point where he was positive that if he received an adverse decision, it would surely kill him.The Homesteader | Oscar Micheaux
He must have seen, long before November 1292, that an adverse decision was a foregone conclusion.King Robert the Bruce | A. F. Murison
Clear as our case was to us the Conference seemed unconvinced, and we began to fear an adverse vote.Fifty Years of Railway Life in England, Scotland and Ireland | Joseph Tatlow
It is true that an adverse claimant cannot give any title to her husband's land that would bar her right thereto.Putnam's Handy Law Book for the Layman | Albert Sidney Bolles
adverse critics contended that he unduly protected the Filipino to the prejudice of the white manʼs interest.The Philippine Islands | John Foreman
British Dictionary definitions for adverse
antagonistic or inimical; hostile: adverse criticism
unfavourable to one's interests: adverse circumstances
contrary or opposite in direction or position: adverse winds
(of leaves, flowers, etc) facing the main stem: Compare averse (def. 2)
- adversely, adverb
- adverseness, 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