Identity

Sexuality

Sexual orientation

Gender

Female

Male

1. a. The quality or condition of being the same in substance, composition, nature, properties, or in particular qualities under consideration; absolute or essential sameness; oneness.
absolute identity, that asserted in the metaphysical doctrine of Schelling that mind and matter are phenomenal modifications of the same substance.

2. a. The sameness of a person or thing at all times or in all circumstances; the condition or fact that a person or thing is itself and not something else; individuality, personality.
personal identity (in Psychology), the condition or fact of remaining the same person throughout the various phases of existence; continuity of the personality.

c. Belonging or relating to identity (sense 2), as in identity crisis, a phase of varying severity undergone by an individual in his need to establish his identity in relation to his associates and society as part of the process of maturing. Also transf.

1974 Times Lit. Suppl. 19 Apr. 409/1 A middle-aged cuckold with piles and an identity crisis.