'Unfairness' definitions:

Definition of 'unfairness'

noun

Partiality that is not fair or equitable [ant: candor, candour, fair-mindedness, fairness]

noun

Injustice by virtue of not conforming with rules or standards [syn: unfairness, inequity] [ant: equity, fairness]

noun

An unjust act [syn: injustice, unfairness, iniquity, shabbiness]

From: GCIDE

Unfair \Un*fair"\, a. [AS. unf[ae]ger unlovely. See Un- not, and Fair, a.] Not fair; not honest; not impartial; disingenuous; using or involving trick or artifice; dishonest; unjust; unequal. [1913 Webster]
You come, like an unfair merchant, to charge me with being in your debt. --Swift. [1913 Webster] -- {Un*fair"ly}, adv. -- {Un*fair"ness}, n. [1913 Webster]