The term 'memory gap' can be defined as a LAPSE in memory, which is a five letter word. It is a phenomenon that occurs when a person cannot recall information or events that happened in the past. Memory gaps can be caused by a variety of factors such as stress, fatigue, or even a traumatic event. They can also be caused by a medical condition such as dementia or Alzheimer's disease. Memory gaps can have a significant impact on a person's life, as they can lead to difficulty in remembering important details or events.