no-fault (n??fôlt?)adj.1. Of or related to a form of state-mandated automobile insurance that compensates a policy holder who becomes an accident victim, regardless of who is at fault.2. Law Of or related to a type of divorce that is granted without requiring proof of fault or bad conduct on the part of either spouse.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.no?-fault` n. 1. a form of automobile insurance entitling a policyholder in case of an accident to collect basic compensation for any financial loss without a determination of liability. adj. 2. of or pertaining to such insurance. 3. holding neither party responsible. [1965?70, Amer.] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.