Nolo's Plain-English Law Dictionary

Annulment

A court procedure that dissolves a marriage and treats it as if it never happened. The most common reason for a person to want an annulment instead of a divorce is for religious purposes. Annulments are rare since the advent of no-fault divorce but may be obtained in most states for one of the following reasons: misrepresentation, concealment (for example, of an addiction or criminal record), misunderstanding, and refusal to consummate the marriage.
NOLO1:DRU1.6.8.11.20160427.37128