1. Musical inability, whether for perception, production, or reproduction of vocal or instrumental sounds: "From an educational perspective, knowledge of every aspect of congenital amusia should enrich the current view of other forms of learning disabilities; such as, dysphasia and dyslexia."
2. Music deafness or the inability of a person to produce or to appreciate musical sounds: "The continued efforts in understanding the causes of congenital amusia should shed light on the question as to whether or not music processing corresponds to a genuine specialization of the brain."
3. An inability to recognize the significance of sounds, manifested as a loss of the ability to recognize or to produce music: "Amusias show a particular deficit in discriminating musical pitch variations and in recognizing familiar melodies."
4. A condition in which there is the loss of a musical ability: "It was tragic that the composer suffered amusia and was unable to continue to compose his own music or even to read the musical scores of other composers."
5. Etymology: from Greek amousia, then through New Latin, "being without the Muses"; especially, with singing.

The inability to produce musical sounds.

1. Music deafness.
2. The inability to appreciate musical sounds.

1. Incapable of singing.
2. Unable to sing.