1. A loss of memory about the events of a particular period of time: Grace's grandfather, suffering from ecmnesia, could remember what happened before his accident, and could remember being home again, but he couldn't remember the accident itself or how it happened.
2. An impairment of memory for recent events with normal remembrance for past events: Ecmnesia is a form of amnesia in which the patient can remember occurrences from bygone times, but not those that have taken place during his or her present time.