West's Encyclopedia of American Law | Irreconcilable Differences

The existence of significant differences between a married couple that are so great and beyond resolution as to make the marriage unworkable, and for which the law permits a DIVORCE.

A divorce premised on the ground of irreconcilable differences is considered a no-fault divorce since there is no need to establish that one party is more responsible or at fault for the end of the marriage than the other.