\begin{definition}[Definition:Isomorphism Class (Algebraic Structures)]
Let $\struct {S, \circ}$ be an algebraic structure.
Let $\map \II {S, \circ}$ be the class of all algebraic structures which are isomorphic to $S$.
Then $\map \II {S, \circ}$ is known as the '''isomorphism class''' of $\struct {S, \circ}$.
\end{definition}