What is the meaning of Inequality?

An unfair, not equal, state.

A statement that of two quantities one is specifically less than (or greater than) another. Symbol: ${\displaystyle <}$ or ${\displaystyle \leq }$ or ${\displaystyle >}$ or ${\displaystyle \geq }$ or ${\displaystyle \neq }$, as appropriate.

unevenness, irregularity

Source: wiktionary.org