Meaning of “unfair” - Learner’s Dictionary

unfair

adjective uk us /ʌnˈfeər/
NOT EQUAL

B1 not treating people in an equal way:

an unfair system
The test was unfair because some people had seen it before.
NOT RIGHT

B2 not true and morally wrong:

[ + to do sth ] It's unfair to blame Frank for everything.
unfairly adverb
unfairness noun [ U ]

(Definition of “unfair” from the Cambridge Learner’s Dictionary © Cambridge University Press)