American English

Definition of adverse adjective from the Oxford Advanced American Dictionary



, NAmE//æd‑//
, NAmE//ˈædvərs//
[usually before noun]
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negative and unpleasant; not likely to produce a good result adverse change/circumstances/weather conditions Lack of money will have an adverse effect on our research program. They have attracted strong adverse criticism. This drug is known to have adverse side effects.
adversely adverb
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Her health was adversely affected by the climate.
See the Oxford Advanced Learner's Dictionary entry: adverse