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.adjectivejump to other results
NAmE//ədˈvərs//, NAmE//æd‑//, NAmE//ˈædvərs//[usually before noun]
Her health was adversely affected by the climate.
adverselyadverbjump to other results