Longman Dictionary English From Longman Business DictionaryRelated topics: Lawdefalcationde‧fal‧ca‧tion /ˌdiːfælˈkeɪʃənˌdɪːfælˈkeɪʃən, ˌdefəl-/ noun [uncountable] LAW when someone who has been trusted to take care of money steals it or uses it dishonestly ldoceonline.com