Definition - What does Irreconcilable Differences mean?
Irreconcilable differences, in the context of divorce laws, refer to conflicting viewpoints between a married couple on basic, fundamental issues that make the marriage unworkable. In no-fault divorce jurisdictions, a couple can be granted a divorce on the grounds of irreconcilable differences. There is no need for the couple to prove wrongdoing by either party in the breakdown of the marriage.
Justipedia explains Irreconcilable Differences
Prior to 1970, most states required proof of fault or wrongdoing by at least one individual in a marriage to grant a divorce. In 1969, California became the first state to enact a no-fault law. A couple didn't need to prove wrongdoing in order to be granted a divorce. The District of Columbia and all of the states in the United States eventually adopted no-fault divorce laws, which allow a divorce on the grounds of irreconcilable differences.
Often, people will file for divorce using irreconcilable differences even if there are legal grounds for divorce (such as adultery). Divorces filed as irreconcilable differences often take less court time.