= singularity, n.

The quality or state of being singular; singularity, †singleness.

Individual character or property; individuality; distinctiveness.

The sum of the attributes which distinguish a person or thing from others of the same kind; individual character or quality, esp. (in later use)…

The quality that makes a person or thing describable as ‘this’; the property of being a unique and individual thing; particular character…

The quality of being ‘this’ (as distinct from anything else): = haecceity, n.

The fact or condition of being an individual; separate and continuous existence as a single indivisible entity; = individuality, n. 4a. Now rare.

The quality or fact of being individual (in various senses); individuality, separateness.

Singularity. Obsolete. rare.

Individualism; individuality.

Individual or distinctive character; individuality; an instance of this.

Hopkins's word for the individual or essential quality of a thing; the uniqueness of an observed object, scene, event, etc. (see quots.).