As per the Disability Discrimination Act 1992 (Cwlth), in relation to a person means:

a) total or partial loss of the person's bodily or mental functions

b) total or partial loss of a part of the body

c) the presence in the body of organisms causing disease or illness

d) the presence in the body of organisms capable of causing disease or illness

e) the malfunction, malformation or disfigurement of a part of the person's body

f) a disorder or malfunction that results in the person learning differently from a person without the disorder or malfunction

g) a disorder, illness or disease that affects a person's thought processes, perception of reality, emotions or judgement or that results in disturbed behaviour

and includes a disability that:

h) presently exists

i) previously existed but no longer exists

j) may exist in the future (including because of a genetic predisposition to that disability), or

k) is imputed to a person.

To avoid doubt, a disability that is otherwise covered by this definition includes behaviour that is a symptom or manifestation of the disability.

Source: Disability Policy