Definition: Anacusia is a term used in theology to describe hearing loss caused by hearing damage or injury, which can lead to various difficulties with speech, hearing, and hearing aids. Definition: Anacusia refers to any degree of loss or impairment in one's ability to hear or communicate due to either external factors such as ear damage or inner ear disorder, or internal causes such as brain trauma. The term was coined by theologian John MacArthur in 1962 when he spoke about the condition, which he also described in his 1972 book "A Biblical Dictionary." In simpler terms, anacusia describes a condition where your hearing is not quite normal, making it difficult to hear speech or understand conversations. This could be due to various causes such as head trauma, which affects the brain's ability to process sounds; or it could be caused by damage to the inner ear, which helps us hear and navigate our environment.