(law) Something contrary to the interests of a party to a lawsuit.

plural of adverse party

plural of adverse witness

(law) The opposing party in a lawsuit under an adversary system of law; adversary.

(economics, business, insurance) The process by which the price and quantity of goods or services in a given market is altered due to one party having information that the other party cannot have at reasonable cost.

(law) a hostile witness.

The rejection for employment, placement, or promotion of a significantly higher percentage of a protected class, when compared with a non-protected class.

(transitive, law) To take ownership of (property) through the doctrine of adverse possession.

(law) A means of acquiring title to another's real property without compensation by occupying the property in a manner that has under common law the requirements of being actual, open and notorious, exclusive, hostile, under cover of claim or right, and continuous for a certain number of years.

(sciences) A side-effect, especially a negative one in pharmacology.