Individuality

Part of speech: noun (n.)

1. The quality or state of being individual or constituting an individual; separate or distinct existence; oneness; unity. Arbuthnot. They possess separate individualities. H. Spencer.

2. The character or property appropriate or peculiar to an individual; that quality which distinguishes one person or thing from another; the sum of characteristic traits; distinctive character; as, he is a person of marked individuality.