The adjective that means “exhibited or characterized by an unreasoned judgment” is biased (“a biased news story”). There is an adjective bias, but it means “diagonal” and is used only of …

A biased collection of data contains more information that supports a particular opinion than you would expect to find if the collection had been made by chance:

While biased can just mean having a preference for one thing over another, it also is synonymous with "prejudiced," and that prejudice can be taken to the extreme.

BIASED definition: having or showing bias or prejudice. See examples of biased used in a sentence.

If someone is biased, they prefer one group of people to another, and behave unfairly as a result. You can also say that a process or system is biased.

Define biased. biased synonyms, biased pronunciation, biased translation, English dictionary definition of biased. also bi·assed adj. Marked by or exhibiting bias; prejudiced: gave a biased …

WordReference Random House Unabridged Dictionary of American English © 2025 bi•ased (bī′ əst), adj. having or showing bias or prejudice: They gave us a biased report on immigration …

biased, adj. meanings, etymology, pronunciation and more in the Oxford English Dictionary

BIASED meaning: having or showing a bias having or showing an unfair tendency to believe that some people, ideas, etc., are better than others

Definition of biased adjective from the Oxford Advanced Learner's Dictionary. tending to show favour towards or against one group of people or one opinion for personal reasons; making …